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- Question
At what rate percent per annum will a sum of money double in 8 years.
Options- A. 12.5%
- B. 13.5%
- C. 11.5%
- D. 14.5%
- Correct Answer
- 12.5%
ExplanationLet principal = P, Then, S.I.= P and Time = 8 years
We know that S.I. = PTR/100
Rate = [(100 x P)/ (P x 8)]% = 12.5% per annum.
- 1. If Gadadhar's salary is 3/2 times of Haamid's and Sarvesh's is 4/3 times of Haamid's, what is the ratio of Gadadhar's salary to Sarvesh's?
Options- A. 9:8
- B. 1:2
- C. 2:1
- D. 8:9 Discuss
- 2. In an army selection process, the ratio of selected to unselected candidates was 4:1. If 90 less had applied and 20 less selected, the ratio of selected to unselected would have been 5:1. How many candidates had applied for the process?
Options- A. 1650
- B. 3300
- C. 825
- D. 4950 Discuss
- 3. Of three positive numbers, the ratio of first and second is 5 : 2, ratio of second and third is 5 : 4. The product of first and third is 1800. What is the sum of the three numbers?
Options- A. 43
- B. 133
- C. 119
- D. 129 Discuss
- 4. Choose the CORRECT option about the two tangents drawn to the circle from the external point? (1) The tangents subtend equal angles at the centre of the circle. (2) The tangents drawn from the external point to a circle are equal in length. (3) The tangents are equally inclined to the segment which joins the centre to that point.
Options- A. 1 and 2 only
- B. 2 and 3 only
- C. 1, 2 and 3
- D. 1 and 3 only Discuss
- 5. Two whole numbers are such that the square of first number exceeds the second by 112 and the ratio of the numbers is 4:3. What is thevalue of smaller number?
Options- A. 3
- B. 4
- C. 12
- D. 36 Discuss
- 6. A sum of money at simple interest amounts to Rs. 815 in 3 years and to Rs. 854 in 4 years. The sum is:
Options- A. 650
- B. 690
- C. 698
- D. 700 Discuss
- 7. What annual instalment will discharge a debt of Rs 1092 due in 3 years at 12% simple interest?
Options- A. Rs.325
- B. Rs.545
- C. Rs.560
- D. Rs.550 Discuss
- 8. In how many years will a sum of Rs.800 at 10% per annum compounded semi annually become Rs.926.10
Options- A. 1.5
- B. 2.5
- C. 3.5
- D. 4.5 Discuss
- 9. A man took loan from a bank at the rate of 12% p.a. simple interest. After 3 years he had to pay Rs. 5400 interest only for the period. The principal amount borrowed by him was:
Options- A. Rs.2000
- B. Rs.10000
- C. Rs.15000
- D. Rs.20000 Discuss
- 10. A certain sum of money amounts to Rs 1008 in 2 years and to Rs 1164 in 3 ½ years. Find the sum and the rate of interest.
Options- A. 800, 14%
- B. 800, 13%
- C. 800, 12%
- D. 800, 19% Discuss
Simple Interest problems
Search Results
Correct Answer: 9:8
Correct Answer: 1650
Correct Answer: 129
Correct Answer: 1, 2 and 3
Correct Answer: 12
Correct Answer: 698
Explanation:
S.I. for 1 year = Rs. (854 - 815) = Rs. 39.
S.I. for 3 years = Rs.(39 x 3) = Rs. 117.
Principal = Rs. (815 - 117) = Rs. 698
Correct Answer: Rs.325
Explanation:
Let each instalment be Rs.x .
1st year = [x + (x * 12 * 2)/100]
2nd year = [ x + (x *12 * 1)/100]
3rd year = x
Then, [x + (x * 12 * 2)/100] + [ x + (x *12 * 1)/100] + x =1092
3x + ( 24x/100 ) + ( 12x/100 ) = 1092
336x =109200
Therefore, x = 325
Each instalment = Rs. 325
Correct Answer: 1.5
Explanation:
Let the time be 'n' years, Then
n = 3/2 or n= 1 Years
Correct Answer: Rs.15000
Explanation:
Principal =
Correct Answer: 800, 13%
Explanation:
S.I. for 1 ½ years = Rs (1164 - 1008) = Rs 156 .
S.I. for 2 years = Rs (156 x x 2)= Rs 208.
Therefore, Principal = Rs (1008 - 208) = Rs 800.
Now, P = 800, T= 2 and S.I. = 208.
Therefore, Rate = (100 x S.I.) / (P x T) = [ (100 x 208)/(800 x 2)]% = 13%
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