This Exam FM sample reference tests Supplemental Savings Deposits. Accumulate the five base deposits and the two supplements to the end of year 5, then grow that total five more years. Solving the target equation gives X = 5958.19, choice C.
How to solve this Supplemental Savings Deposits question
Setup
Setup
The five beginning-year deposits accumulate to time 5 as an annuity-due accumulated value. The two supplements at the beginnings of years 4 and 5 form a two-payment accumulated annuity-due.
S5=14,000s¨5∣0.08+Xs¨2∣0.08
Model
Model
Grow the time-5 balance to the time-10 goal.
150,000=(14,000s¨5∣0.08+Xs¨2∣0.08)(1.08)5
Compute
Compute
The time-5 coefficients are 88703.01 for base deposits and 2.2464 for X.
X=5,958.188
Answer
Answer
Each supplemental deposit is about 5958, choice C.
X≈5,958(C)
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These notes identify the calculation error associated with each wrong letter when that error is reproducible.
AChoice A places both supplemental deposits at time 5 and omits their earlier accumulation.
BChoice B divides the remaining time-10 shortfall by two without discounting it to the deposit dates.
DChoice D treats the supplements as end-of-year rather than beginning-of-year deposits.
EChoice E solves for one lump sum at the beginning of year 4 instead of two equal supplements.
Original practice · fully worked
Original variant: terminal value of a two-tier savings schedule
A saver deposits 8,000 at the beginning of each of four years. At the beginning of years 3 and 4, the saver adds an extra 2,000. The account earns 7% effective annually. Determine the balance at the end of year 8.
A 48,920.18
B 51,776.90
C 53,412.26
D 55,624.56
E 58,115.44
Variant answer in brief
At time 4 the four base deposits and two supplements total their accumulated due values. Four more years of growth produce 55624.56, choice D.
Setup
Setup
Accumulate the four base deposits and the final two supplemental deposits to time 4.
The 2210-page Financial Mathematics Proof Manual reorganizes 461 verified Exam FM solutions by syllabus skill and adds formula proofs, error patterns, and original worked practice.