Number Series Completion - Study Mode

[#181] Find the missing term: 3, 12, 27, 48, 75, 108, ?
Correct Answer

(A) 147

Explanation

Solution: The terms of the given series are 3 × 1 2 , 3 × 2 2 , 3 × 3 2 , 3 × 4 2 , 3 × 5 2 , 3 × 6 2 ,............... So, missing term = 3 ×7 2 = 3 × 49 =147

[#182] Find the missing term: 7, 26, 63, 124, 215, 342, ?
Correct Answer

(D) 511

Explanation

Solution: The terms of the given series are (2 3 - 1), (3 3 - 1), (4 3 - 1 ), (5 3 - 1), (6 3 - 1), (7 3 - 1),.......... So, missing term = (8 3 - 1) = (512 - 1) = 511.

[#183] Find the missing number:- 0.5, 0.55, 0.65, 0.8, ?
Correct Answer

(C) 1

Explanation

Solution: The pattern is + 0.05, + 0.10, + 0.15,................ So, missing term = 0.8 + 0.20 = 1

[#184] Find the missing term: 9, 27, 31, 155, 161, 1127, ?
Correct Answer

(B) 1135

Explanation

Solution: The pattern is × 3, + 4, × 5, + 6, × 7, So, missing term = 1127 + 8 =1135

[#185] Find the missing term: 5, 6, 9, 15, ?, 40
Correct Answer

(B) 25

Explanation

Solution: The pattern is + 1, + 3, + 6, ............i.e., + 1, + (1 + 2) + (1 + 2 + 3)............... So, missing term = 15 + (1 + 2 +3 +4) = 25