721 Find the next number in the series: 121, 144, 169, 196, ?
Explanation
- This is a series of squares of consecutive numbers
- 11^2,12^2,13^2,14^2,15^2
- 15^2=225
Last verified on 25-09-2026
General Knowledge MCQs
750 MCQs is category mein available hain.
All MCQs in General Knowledge
722 The ages of two persons differ by 16 years. If 6 years ago, the elder one was 3 times as old as the younger one, find the elder’s present age.
Explanation
- Let younger = y, elder = y + 16
- (y + 16 - 6) = 3(y - 6)
- y + 10 = 3y - 18
- 2y = 28 => y = 14
- Elder's age = 14 + 16 = 30 years
Last verified on 25-09-2026
723 Find the next number in the series: 1, 4, 9, 16, 25, ?
Explanation
- This is a series of perfect squares
- 1^2, 2^2, 3^2, 4^2, 5^2, 6^2
- 6^2 = 36
Last verified on 25-09-2026
724 Find the next number in the series: 2, 5, 10, 17, 26, ?
Explanation
- The differences between terms increase by 2 each time
- Differences: 3,5,7,9,11
- 26+11=37
Last verified on 25-09-2026
725 A’s age is thrice that of B’s. 5 years back, A was 5 times as old as B. Find A’s present age.
Explanation
- Let B = x, A = 3x
- (3x - 5) = 5(x - 5)
- 3x - 5 = 5x - 25
- 2x = 20 => x = 10
- A's present age = 3 x 10 = 30 years
Last verified on 25-09-2026
726 Find the next number in the series: 5, 10, 20, 40, ?
Explanation
- Each term is double the previous term
- 5x2=10, 10x2=20, 20x2=40, 40x2=80
Last verified on 25-09-2026
727 Find the next number in the series: 3, 7, 15, 31, 63, ?
Explanation
- Each term follows the pattern: multiply previous term by 2 and add 1
- 63x2+1=127
Last verified on 25-09-2026
728 Present ages of P and Q are in ratio 5:6. Eight years hence, the ratio will be 7:8. Find P’s present age.
Explanation
- Let ages be 5k and 6k
- (5k+8)/(6k+8) = 7/8
- 40k + 64 = 42k + 56
- k = 4
- P's age = 5 x 4 = 20 years
Last verified on 25-09-2026
729 Find the next number in the series: 1, 1, 2, 3, 5, 8, ?
Explanation
- This is the Fibonacci series
- Each term is the sum of the previous two terms
- 5+8=13
Last verified on 25-09-2026
730 Find the next number in the series: 90, 80, 71, 63, 56, ?
Explanation
- The differences between terms decrease by 1 each time
- Differences: -10,-9,-8,-7,-6
- 56-6=50
Last verified on 25-09-2026