This is driving me nuts, please explain rate of return. I thought that i knew it but nope..... for some reason for the life of me I cant seem to get the right answer. I am using the BA II Plus

What rate of return results in a present value of $432 for $250 received one year from now and another $250 received two years from now?

Answer: 10.94%

What rate of return results in a present value of $23 for $25 received one year from now?

Answer: 8.4%

For this question, it keeps on giving me 8%, but when reversing the question and placing 8.4% as interest, my payment comes out to be 24.94 or something like