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Mathematical Series Questions for Competitive Exams

6 months ago 156.0K Views
Q :  A sum of money at compound interest amounts to thrice itself in three years. In how many years will it be 81 times itself?

(A) 27

(B) 9

(C) 12

(D) 15

(E) None of these

Correct Answer : C

Q :  A borrows a sum at 6% per annum. Rate is to be increased by 5% each year. After four year he pays Rs.3375 as simple interest. How much had he borrowed?

(A) 12,000

(B) 12500

(C) 10,000

(D) 8,000

(E) None of these

Correct Answer : B

Q :  Rs 1250 becomes Rs 1352 after a certain period at the rate of 4% per annum. Find out the period of investment, if interest add in principal after every year?

(A) 4 years

(B) 2 years

(C) 3 years

(D) 5 years

Correct Answer : B

Q :  Two equal amounts are deposited in two different banks at 12% for 3 years and 4.5 years. The difference between simple interest received is Rs. 72. Find the amount deposited in bank.

(A) 500

(B) 400

(C) 600

(D) 450

Correct Answer : B

Q :  The difference between C.I and S.I is Rs 200 at 5% for 2 years. Find the principal?

(A) 80,000

(B) 40,000

(C) 20,000

(D) 10,000

Correct Answer : A

Q :  A sum is lent for 4 years at simple interest. Had the rate been 3% less, simple interest received would also have been Rs. 96 less. Find the principal?

(A) 900

(B) 800

(C) 700

(D) 1200

Correct Answer : B

Q :  Difference between C.I and S.I for 3 years at 10% is Rs 465. Find the principal.

(A) 15000

(B) 12000

(C) 14000

(D) 13000

Correct Answer : A

Q :  The average age of man and his son is 35 years. The ratio of their ages is 5:2 respectively. What is the son’s age?

(A) 50 Years

(B) 35 Years

(C) 15 Years

(D) 20 Years

(E) None of these

Correct Answer : D

Q :  15 years back ratio of the age of father and son was 6:1. 5 years after it will be 2:1. What is father’s present age?

(A) 45

(B) 40

(C) 50

(D) 35

Correct Answer : A

Q :  The ratio of the present age of A and B is 4:5. The sum of their age after 4 years will be 80 years. What will be the ratio of their age after 4 years?

(A) 11:9

(B) 9:11

(C) 3:4

(D) 1:2

(E) None of these

Correct Answer : B

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