Tebogo wrote on 19-Nov-2019, with regard to HP10bii Troubleshooting.
The calculator displays the two shift arrows and doesn’t allow me to enter any data. Seems to be stuck on 0.00 screen with two arrows below the digits (read...)

Anonymous wrote on 17-Nov-2019, with regard to HP 18c Business Consultant..
L'apparecchio è stato fermo 4-5 anni, ora non si accende più. Cosa posso fare per risolvere? Grazie (read...)

Peter Tong wrote on 03-Nov-2019, with regard to HP 39gs (HP 40gs) Graphing Calculator for for Mathematics and Science Classes.
Sounds like the first line of the entire LED screen faulty. Sorry, there is nothing much one can do to fix this. (read...)

Peter Tong wrote on 03-Nov-2019, with regard to hp 12c (platinum) - Handling Error Conditions.
Could be a fault in the calculator. Try removing it's batteries and replacing it back after a couple of minutes. (read...)

In replying to John Arias who on 02-Nov-2019 wrote: Keep gettjng error 7 & I cleared and reset the registers to manufactory conditions. This platinum hp 12c is a nightmare. Any pointers on how to fix this I have a exam soon.

John Arias wrote on 02-Nov-2019, with regard to hp 12c (platinum) - Handling Error Conditions.
Keep gettjng error 7 & I cleared and reset the registers to manufactory conditions. This platinum hp 12c is a nightmare. Any pointers on how to fix this I have a exam soon. (read...)

Duc wrote on 02-Nov-2019, with regard to HP 39gs (HP 40gs) Graphing Calculator for for Mathematics and Science Classes.
My Hp 40gs screen doesn't show a left column, that why I can't see half of the first number when I enter: for example: if I enter number 4, I can see only I instead of 4. or number 8, I can see is half of number 8, looked like 3. (read...)

Carlos wrote on 29-Oct-2019, with regard to HP 17bII+.
Hi, what's the difference between the HP 17BII+ and the discontinuos HP 19BII? Thanks. (read...)

Peter Tong wrote on 28-Oct-2019, with regard to hp 10bII - Resetting.
most text book requires the calculator to be set to 1P_Yr. The default for 10bII+ is 12P_Yr. Press Shift C_All you will see this setting. (read...)

In replying to Shikha who on 25-Oct-2019 wrote: My HP Financial calculator always gives the wrong answer. Diffrence always by 2 or 3 more pls help

Shikha wrote on 25-Oct-2019, with regard to hp 10bII - Resetting.
My HP Financial calculator always gives the wrong answer. Diffrence always by 2 or 3 more pls help (read...)

In replying to Arsh who on 08-Jun-2018 wrote: my calculator is showing wrong answers. please resolve my problem its urgent.

Anonymous wrote on 25-Oct-2019, with regard to HP Office Calc 100 (EOL).
ie. set tax rate to 20% - Press 2 and 0 - press RATE-button - press +TAX-button check current rate - Press RATE-button - Press -TAX-button (read...)

In replying to Judy who on 28-Apr-2019 wrote: how to I change the tax rate on HP OfficeCalc 100 please

Anonymous wrote on 23-Oct-2019, with regard to HP 39gs.
This is zero within the limitations of the precision of computer arithmetic. (read...)

In replying to Anonymous who on 03-Mar-2019 wrote: This site is very useful for me. I'm in trouble with definite integral calculation on HP39gs (ROM v2.22). The following expression does not become zero. ∫(0,360,cos(X),X) = -5.8572E-11 (Angle Measure: Degrees) Is this something like bug? Does anyone know?

Lei wrote on 22-Oct-2019, with regard to Changing the HP10BII Periods per Year Setting.
Thank you so much for the explanation. It helps me millions. I was crazy about the calculations of pv, fv and i/yr. I appreciate that. (read...)

Anonymous wrote on 21-Oct-2019, with regard to Blaise Pascal - first digital calculating machine.
i dont get it it's just so confusing i'm used modern day caculators (read...)

Peter Tong wrote on 21-Oct-2019, with regard to IRR Problem on my new 10bII.
depending on the type of problem to solve, you may need to enter negative value to some variable. (read...)

In replying to Anonymous who on 11-Oct-2019 wrote: Why do I keep getting no solution when calculating the irr

Peter Tong wrote on 21-Oct-2019, with regard to hp 12c (platinum) - Resetting the Calculator.
there is a battery cover at the back of the 12c. Just slight it out the cover then pry the coin battery out with a paper clip and replace it with a new battery. (read...)

In replying to Anonymous who on 17-Oct-2019 wrote: how to remove or open the battery door to replace battery in hp 12c calculator

Annonymous wrote on 20-Oct-2019, with regard to HP 10bII+.
hey Some of my buttons on my financial calculator seem to be disabled. Some of them work and some don't. I cant do simply functions such as add or subtract. I tried to reset it but that didn't work also. is there a reason why this is happening? is there a way to fix it or is my calculator just dead? I bought it last year btw and I have not used it much, my exams are coming up soon!! (read...)

Anonymous wrote on 17-Oct-2019, with regard to hp 12c (platinum) - Resetting the Calculator.
how to remove or open the battery door to replace battery in hp 12c calculator (read...)

BobCol wrote on 12-Oct-2019, with regard to HP Calculators Timeline.
If my memory serves me right the HP 15c was the first pocket calculator to perform matrix calculations. Is that correct? (read...)

David wrote on 11-Oct-2019, with regard to HP 40gs (EOL).
I need to replace an HP-49g, what is the numeric range for the 40gs. The 35s and Prime can go from -499 to +499, the 300s+ is only +-99. What is the 40gs, I can't find it? Thanks (read...)

Anonymous wrote on 11-Oct-2019, with regard to IRR Problem on my new 10bII.
Why do I keep getting no solution when calculating the irr (read...)

Anonymous wrote on 10-Oct-2019, with regard to Blaise Pascal - first digital calculating machine.
actually Wilhelm Schickard did (read...)

In replying to Rk_on_war who on 14-Jul-2018 wrote: i think pascal invented the first mechanical calculator not digital.

Ernest wrote on 06-Oct-2019, with regard to Services.
I am seeking a battery pack for an HP-10 printing calculator. (read...)

Konrad wrote on 03-Oct-2019, with regard to Services.
when will HP have a new scientific- or graphing- calculator with standard, rechargeable (long-lasting) Li-ion batteries and e-ink display? And good old quality keyboard? (read...)

Anonymous wrote on 02-Oct-2019, with regard to Blaise Pascal - first digital calculating machine.
Do you think so (read...)

In replying to Rk_on_war who on 14-Jul-2018 wrote: i think pascal invented the first mechanical calculator not digital.

Anonymous wrote on 02-Oct-2019, with regard to Blaise Pascal - first digital calculating machine.
Looking for the use of device (read...)

17k On Top wrote on 27-Sep-2019, with regard to Blaise Pascal - first digital calculating machine.
page is a'ight, ive seen better.. (read...)

Patrick wrote on 23-Sep-2019, with regard to HP 41cx Emulator.
If you key in 2000 and hit Enter twice, then .02, x, +. You get 2040 on calculator or emulator. (read...)

In replying to Anonymous who on 26-Mar-2019 wrote: Hi, I also used this calculator in back then! May I ask you for a favor: If you type the following sequence on the HP41: 2000 Enter 0.02 x + What do you get? I thought that I remember that you get 2040 when you do this, however, using an emulator, this doesn't work. I am in discussion about this with James Thomson who wrote PCalc for iOs, which I use as my HP41 replacement (for simple calculations). Your answer would really help me. Cheers, Nikolaus

Edwin wrote on 20-Sep-2019, with regard to hp 10bII - Tutorial Lump Sums.
I have solved the following question: You are an investor with the opportunity to purchase a building for $600,000. If you want to earn an annual rate of return of 10% , what will the asking price need to be if you plan to sell the building in 5 years? The answer is -372,552.79 using the calculator and formula. Is this correct? Please let me know. I used sample 2 as a guide. Thank you. (read...)

Tom wrote on 19-Sep-2019, with regard to HP 10bII+ Emulator.
how can one get instruction on how to use it (read...)

Anonymous wrote on 15-Sep-2019, with regard to hp 10bII - Tutorial Varying Cash Flows.
147.08 (read...)

In replying to Kathy who on 23-Jun-2019 wrote: Need help solving this please: You enter into a 5 year net lease with tenant for 2,000 sq. ft. of space. The lease states that you will provide a TI allowance of $20 per sq. ft. Assume that the TI allowance is used to fund improvements in the tenants space at the beginning of the first year. In return for using the space, the tenant will pay an initial annual rent of $40 per sq. ft. at the end of the first year of the lease term, with subsequent increases to $41 per sq. ft. in year 2, $42 ...

Ron Madsen wrote on 14-Sep-2019, with regard to HP 41cx Emulator.
Have used the great V41 for years - ending use now because on Windows 10, the emulator does not save the setting of the font. I turn off TrueType font because digits extend beyond right edge of display. When I re-invoke V41, it is back to using TrueType fonts again. I have been unable to fix this problem. (read...)

Anonymous wrote on 14-Sep-2019, with regard to HP 12C & HP12C Platinum - Differences.
is there a way to fix incorrect input in the CF calculation without re-entering the whole CF? e.g., in the above example, I wrongly input 2,000,000 instead of 20,000,000 for year 4 CF (read...)

Joe wrote on 11-Sep-2019, with regard to HP Calculator Connectivity Kit for HP Prime.
Connectivity kit to send .hpprgm to prime Calculator, using win 10. I have tried drag and drop every way but it doesn't work. Any help would appreciated. (read...)

Anonymous wrote on 10-Sep-2019, with regard to HP 11c Quick Reference.
WHAT IS THE PRICE IN US$ ?? (read...)

Peter Tong wrote on 10-Sep-2019, with regard to HP 17bII+.
Hi Vincent, in Singapore you can contact reseller like Seasound (Tel +65-62228449) located in Raffles Place. If in Malaysia, you can contact Mr KS Tay of G2 (+603-80628449). (read...)

In replying to Vincent who on 10-Sep-2019 wrote: Hi, do you all sell this calculator? If not, could you point me to a reseller that does please?

Vincent wrote on 10-Sep-2019, with regard to HP 17bII+.
Hi, do you all sell this calculator? If not, could you point me to a reseller that does please? (read...)

Anonymous wrote on 08-Sep-2019, with regard to Leonardo da Vinci - first conceived mechanical calculator .
Its so wonderful that Leonardo had time to design this. (read...)

Chit wrote on 07-Sep-2019, with regard to HP10BII Calculation Example 1.
Thank you for simplifying the mystery of this calculator (read...)

Chit wrote on 07-Sep-2019, with regard to HP10BII Calculation Example 1.
Thank you for simplifying the mystery of this calculator (read...)

Anonymous wrote on 30-Aug-2019, with regard to Blaise Pascal - first digital calculating machine.
just here from looking for the first invented calculator. (read...)

Liz wrote on 28-Aug-2019, with regard to hp 10bII - Tutorial Varying Cash Flows.
did you figure this question out, I too am stuck on it. (read...)

In replying to Jayne who on 07-Aug-2019 wrote: Hi Kathy, I'm stuck on the same question, did you figure it out? if so, can you kindly assist me? Thanks so much

Liz wrote on 28-Aug-2019, with regard to hp 10bII - Tutorial Varying Cash Flows.
Did you get the answer to this question (read...)

In replying to Anonymous who on 20-Aug-2019 wrote: What is the correct answer?

Peter Tong wrote on 24-Aug-2019, with regard to HP10bii Troubleshooting.
Try to reset the calculator . Then set the calculator to 1/year. (read...)

In replying to Anonymous who on 24-Aug-2019 wrote: I hAve been trying to set up my hpb10plus calculator to 1P/YR it doesn't respond. What do I do

Anonymous wrote on 24-Aug-2019, with regard to HP10bii Troubleshooting.
I hAve been trying to set up my hpb10plus calculator to 1P/YR it doesn't respond. What do I do (read...)

Garett wrote on 22-Aug-2019, with regard to HP 50g.
Hi, My fixed mode will only show the decimal places if there are values after the decimal place. Ie it will show a value of 500, instead of 500.0000, but if the value is 500.1, it will show it as 500.1000. I have tried to change the fixed mode value but it does not affect it. I would like all the decimals shown as place holders. This only happened after it was left on in my survey vest and buttons were pushed. Thank you for your help. (read...)

Anonymous wrote on 20-Aug-2019, with regard to hp 10bII - Tutorial Varying Cash Flows.
What is the correct answer? (read...)

In replying to Kathy who on 23-Jun-2019 wrote: Need help solving this please: You enter into a 5 year net lease with tenant for 2,000 sq. ft. of space. The lease states that you will provide a TI allowance of $20 per sq. ft. Assume that the TI allowance is used to fund improvements in the tenants space at the beginning of the first year. In return for using the space, the tenant will pay an initial annual rent of $40 per sq. ft. at the end of the first year of the lease term, with subsequent increases to $41 per sq. ft. in year 2, $42 ...

Anonymous wrote on 16-Aug-2019, with regard to Leonardo da Vinci - first conceived mechanical calculator .
AMAZING WEBSITE OMG! (read...)

Mike wrote on 15-Aug-2019, with regard to hp 50g - Change Display Mode.
Thank you. Thats what I needed (read...)

Jayne wrote on 07-Aug-2019, with regard to hp 10bII - Tutorial Varying Cash Flows.
Hi Kathy, I'm stuck on the same question, did you figure it out? if so, can you kindly assist me? Thanks so much (read...)

In replying to Kathy who on 23-Jun-2019 wrote: Need help solving this please: You enter into a 5 year net lease with tenant for 2,000 sq. ft. of space. The lease states that you will provide a TI allowance of $20 per sq. ft. Assume that the TI allowance is used to fund improvements in the tenants space at the beginning of the first year. In return for using the space, the tenant will pay an initial annual rent of $40 per sq. ft. at the end of the first year of the lease term, with subsequent increases to $41 per sq. ft. in year 2, $42 ...

José R. Bueno wrote on 14-Jul-2019, with regard to HP 41cx Emulator.
Dear Gentlemen. I am an engineer graduated in the last century and I do not like and I do not know how to use another calculator other than the HP 51X series. So I would like to express my sincere thanks for allowing me to download the emulator program from my inseparable HP51CX. Thank you very much. Best regards. José R. Bueno - São Paulo - Brazil (read...)

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