Comments: It seems as though any problem involving the time value of money can be solved using any of the tables or equations. The key is to always make it easy on yourself. Solve it in a way that fits your intuition. Heres one way to think of the factors:

PV of an Annuity => The investment required to support an annuity of withdrawals.

FV of an Annuity => The balance to which an annuity of deposits will accumulate.

Our problem statement will involve deposits during working years to support withdrawals during retirement. It might be easy to work from retirement needs to deposts during working life. The accumulated investment at the date of retirement should be the PV of with draws The FVof the deposits should accumulate to the required investments

Problem Statement: Sandra Jones intends to retire in 20 years at the age of 65. As yet, she has not provided for retirement income, and she wants to set up a periodic savings plan to do this. She has the opportunity to make equal annual payments into a savings account that pays 4 percent interest per year.

Requirement: How large must her payments be to ensure that after retirement she will be able to draw $30,000 per year from this account until she is 80?

Time =>