Series Completion - Study Mode
[#136] 3, 7, 23, 95, ?
Correct Answer
(C) 479
Explanation
Solution: The pattern is x 2 + 1, x 3 + 2, x 4 + 3,..... So, missing term = 95 x 5 + 4 = 479.
[#137] 6, 18, 3, 21, 7, 56, ?
Correct Answer
(A) 8
Explanation
Solution: Each term at an even place in the series is the product of its two adjacent terms. Thus, if the missing term be x, then we have : 7 x x = 56 or x = 56 รท 7 = 8.
[#138] 4, 9, 25, ?, 121, 169, 289, 361
Correct Answer
(A) 49
Explanation
Solution: The given series consists of squares of consecutive prime numbers i.e. 2 2 , 3 2 , 5 2 ,....., 11 2 , 13 2 , 17 2 , 19 2 . So, missing term = 7 2 = 49.
[#139] 6, 13,28,59,?
Correct Answer
(D) 122
Explanation
Solution: 1st number : 6
2nd number : 6 X 2 +1 = 13
3rd number : 13 X 2 + 2 = 28
4th number : 28 X 2 + 3 = 59
therefore 5th number : 59 x 2 + 4 = 122
[#140] 4, 12, 36, 108, ?
Correct Answer
(D) 324
Explanation
Solution: The pattern is x 3. So, missing term = 108 x 3 = 324.