Whole Numbers II - JSS3 Mathematics Past Questions and Answers - page 2
What is the compound interest earned on $1500 at an annual interest rate of 4% compounded annually for 3 years?
$187.20
$180.00
$187.50
$190.00
If the principal amount is $2000, the annual interest rate is 6%, and the interest is compounded annually, what is the amount after 2 years?
$2240
$2120
$2247.20
$2200
If 6 pencils cost $12, how much do 9 pencils cost?
12/6= 2 dollars per pencil. So, 9 pencils cost
9×2=18 dollars.
If 4 workers can finish a job in 8 days, how many days will it take for 8 workers to finish the same job?
Using inverse proportion:
4×8=8×𝑑,
so 𝑑=32/8= 4 days.
Calculate the amount after 1 year for a principal amount of $500 at an annual interest rate of 10%, compounded annually.
𝐴=500(1+0.10/1)1×1
=500×1.10
=550.
The amount after 1 year is $550.
What is the compound interest earned on $1000 at an annual interest rate of 5%, compounded annually for 2 years?
𝐴=1000(1+0.05/1)1×2
=1000×1.1025
=1102.50.
The compound interest earned is 1102.50−1000=102.50 dollars.