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# IRR Problem on my new 10bII

Brian wrote:

I am facing problem with the calculation of IRR on my new 10bII.
The IRR computation is wrong.
To compute IRR of the following cash flows: - -11 + 12 / ? Where NPV is 0
The process I keyed in is

`Shift clear all11 (+ / -) CFj12 CFjShift IRR / YR`

The answer I get now is 109.0909

This is obviously wrong. I used to get 9.0917 percent.

Can you kindly advise?

---

Hi Brian,

You need to set the P / YR to 1. The default is 12.

1 Shift P / Yr

Shift c all "Screen should display 1"

11 (+ / -) CFj

12 CFj

Shift IRR / YR  "Screen should display 9.0909"

Here is a primer to setting up your HP 10bII.

Updated On: 12.09.03

1. On 11-Oct-2019, Anonymous wrote:
Why do I keep getting no solution when calculating the irr
• On 21-Oct-2019, Peter Tong replied:
depending on the type of problem to solve, you may need to enter negative value to some variable.

2. On 28-Aug-2012, Anonymous wrote:
Why do I keep getting "No Solution"? Solving for interest rate:
PV=0
FV=801,455
N = 20 (annual)
PMT = 40,000
Appreciate the help. Using HP10BII+
• On 03-Sep-2012, Peter Tong replied:
You got to enter a negative value for PMT. Enter 40000 then press the [+/-] key.