Try this site where you can compare quotes from different companies: WWW.ANNUITY-HELP.US Will you help me with an annuity/algebra problem? Given that the present value of a basic annuity-due with n payments is 12 and given that the present value of a basic annuity-due with 2n payments is 21, find the present value of a basic annuity-immediate with 4n payments. Note: the formula for value of basic annuity due = (1 - (1+i)^(-n))/d where d = i/(1+i) and the formula for value of basic annuity-immediate = (1 - (1+i)^(-n))/i i is the annual effective interest rate and d is the annual effective discount rate. Please help!!!