Number Series Completion - Study Mode

[#151] 6, 10, 14, 18, 22, 26, 30, ... choose which pair of numbers comes next?
Correct Answer

36, 40

Explanation

Solution: This simple addition series adds 4 to each number to arrive at the next.

[#152] 8, 12, 9, 13, 10, 14, 11, ... choose which pair of numbers comes next?
Correct Answer

(B) 15, 12

Explanation

Solution: This is an alternating addition and subtraction series, in which the addition of 4 is alternated with the subtraction of 3.

[#153] Find the missing term: 2, 12, 36, 80, 150, ?
Correct Answer

(C) 252

Explanation

Solution: The given series is a triangular pattern series. So, we have 2 xa0xa0xa0xa0xa0 12 xa0xa0xa0xa0xa0 36 xa0xa0xa0xa0xa0 80xa0xa0xa0xa0xa0150xa0xa0xa0xa0xa0? 10 xa0xa0xa0xa0xa0 24 xa0xa0xa0xa0xa0 44 xa0xa0xa0xa0xa0 70 14 xa0xa0xa0xa0xa0xa0 20 xa0xa0xa0xa0 26 6 xa0xa0xa0xa0xa0xa0xa0xa0xa0xa06 So, missing term = 150 + (70 + 26 + 6) = 150 + 102 = 252

[#154] Find the missing term: 625, 5, 125, 25, 25, ?, 5
Correct Answer

(C) 125

Explanation

Solution: The given sequence is a combination of two series: I. 625, 125, 25, 5 and II. 5, 25, ? The pattern is ÷ 5, while that in II is × 5. So, missing term = 25 × 5 = 125

[#155] Find the missing term: 2, 9, 28, ?, 126, 126, 217, 344
Correct Answer

(B) 65

Explanation

Solution: The given series is a triangular pattern series. So, we have Series I :xa0xa02xa0xa0xa0xa0xa09xa0xa0xa0xa0xa028xa0xa0xa0xa0xa0? 126xa0xa0xa0217xa0xa0xa0xa0344 Series II :xa0xa07xa0xa0xa0xa0xa019xa0xa0xa0xa0xa0? ?xa0xa0xa091xa0xa0xa0xa0127 Series III :xa0xa0xa0xa0xa0xa0xa012xa0xa0xa0xa0xa0?xa0xa0xa0xa0xa0? ?xa0xa0xa036 Clearly, to form a pattern, the missing terms in Series III must be 18, 24, 30 So, missing term = 127 + (61 + 24 + 6) = 127 + 91 = 218