Practicing questions on simple interest worksheet help the children to calculate simple interest (S.I.) and amount (A). We will recapitulate the same and know more about it and practice more questions given in the *worksheet on simple interest*.

While solving the questions on simple interest worksheet we need to remember; *the formula for calculating simple interest (S.I.) = (P × R × T)/100 and, formula for calculating amount (A) = P + I*

**1. Find the simple interest and amount in each of the following:**

(a) P = $1800 R = 5% T = 1 year

(b) P = $2600 R = 12% T = 3 years

(c) P = $3125 R = 15% T = 73 days

(d) P = $5660 R = 11% T = 9 months

(e) P = $180 R = 3% T = 1¹/₄ year

*Word problems on simple interest worksheet:*

2. What sum would yield an interest of $36 in 3 years at 3% p.a.?

3. At what rate per cent per annum will $250 amount to $330 in 4 years?

4. At what rate per cent per annum will $400 yield an interest of $78 in 1¹/₂ years ?

5. In what time will $400 amount to $512 if the simple interest is the calculated at 14% p.a.?

6. A sum amount to $2400 at 15% simple interest per annum after 4 years. Find the sum.

7. Ken borrowed $2000 from Sam at 8% per annum. After 6 year he cleared the amount by giving $2600 cash and a watch. Find the cost of the watch.

8. In how many years will $400 yield an interest of $112 at 14% simple interest?

9. In how many years will $12000 yield an interest of $13230 at 10% simple interest?

10. In how many years will $600 double itself at 10% simple interest?

11. At what rate of simple interest will $5000 amount to $6050 in 3 years, 4 months?

12. At what rate of simple interest will the sum of money double itself in 6 years?

13. Find the simple interest at the rate of 5% p.a. for 3 years on that principal which in 4 years, 8 months at the rate of 5% p.a. gives $1200 as simple interest.

14. At what rate per cent per annum will $4000 yield an interest of $410 in 2 years?

15. Simple interest on a certain sum is ¹⁶/₂₅ of the sum. Find the rate per cent and time if both are numerically equal. **[Hint: (T = R), P = x, S.I. = ¹⁶/₂₅ x] **

16. Simple interest on a sum of money at the end of 5 years is ⁴/₅ of the sum itself. Find the rate per cent p.a.

Answers for simple interest worksheet are given below to check the exact answers of the given questions on S.I.

1. (a) $90, $1890

(b) $936, $3536

(c) $93.75, $3218.75

(d) $466.95, $6126.95

(e) $6.75, $186.75

2. $400

3. 8%

4.13%

5. 2 years

6. $1500

7. $360

8. 2 years

9. 10¹/₄ years

10. 8¹/₃ years

11. 6.3%

12. 16²/₃%

13. $771.42

14. 5¹/₈%

15. 8%, 8 years

16. 16%

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