Number Series Completion - Study Mode

[#136] Find out the wrong term: 2, 5, 10, 50, 500, 5000
Correct Answer

(D) 5000

Explanation

Solution: Each term of the series is the product of the preceding two terms. So, 5000 is wrong and must be replaced by (50 × 500) = i.e., 25000

[#137] Find out the wrong term:3, 10, 27, 4, 16, 64, 5, 25, 125
Correct Answer

(C) 10

Explanation

Solution: The correct sequence is 3, 3 2 , 3 3 ,4, 4 2 , 4 3 ,5, 5 2 , 5 3 So. 10 is wrong and must replaced by 3 2 i.e., 9

[#138] Find out the wrong term: 46080, 3840, 384, 48, 24, 2, 1
Correct Answer

(C) 24

Explanation

Solution: The correct pattern is ÷ 12, ÷ 10, ÷ 8, ÷ 6,......... So, 24 is wrong and must be replaced by (48 ÷ 6) i.e., 8.

[#139] Find out the wrong term: 25, 36, 49, 81, 121, 169, 225
Correct Answer

(A) 36

Explanation

Solution: The correct sequence is 5 2 , 7 2 , 9 2 , 11 2 , 13 2 , 15 2 . So, 36 is wrong.

[#140] Find out the wrong term: 5, 10, 40, 80, 320, 550, 2560
Correct Answer

(C) 550

Explanation

Solution: The correct pattern is ×2, ×4, ×2, ×4 . . . . . . So, 550 is wrong and must be replaced by (320 × 2) i.e., 640