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Question Detail
6, 11, 21, 36, 56, ?
what will replace the question mark in the series ?
- 75
- 81
- 85
- 89
Answer: Option B
Explanation:
Pattern is +5, +10, + 15, +20
Next number in the series will be 56 + 25 = 81
1. In the series 2, 6, 18, 54, ... what will be the 8th term ?
- 4174
- 4150
- 4274
- 4374
Answer: Option D
Explanation:
We can see the given series is in G.P.
as 2*3 = 6, 6*3 = 18, 18*3 = 54
So a = 2 , r = 3
nth term in G.P. is
\begin{aligned}
ar^{n-1} \\
= 2*3{8-1} \\
= 2*3^7 \\
= 2*2187 = 4374
\end{aligned}
2. Complete the series, 1, 4, 9, 16, 25,....
- 36
- 38
- 49
- 52
Answer: Option A
Explanation:
Series Pattern is +3, +5, +7, +9.
So next number = 25+11 = 36
3. Complete the series
1,6,13,22,33,...
- 46
- 48
- 49
- 51
Answer: Option A
Explanation:
Pattern is +5, +7, +9, +11
So next number will be +13
=> 33+13 = 46
4. 13, 32, 24, 43, 35, (...), 46, 65, 57, 76
- 52
- 54
- 56
- 60
Answer: Option B
Explanation:
There are two series in this sequence
Series 1: 13, 24, 35, 46, 57
Series 2: 32, 43, (..), 65, 76
The pattern it is following is +11
Missing number will be 43 + 11 = 54
5. 13, 35, 57, 79, 911, ?
- 1005
- 1110
- 1113
- 1140
Answer: Option C
Explanation:
The terms of the given series are numbers formed by joining together consecutive odd numbers in order i.e. 1 and 3, 3 and 5, 5 and 7, 7 and 9, 9 and 11, .....
So, missing term = number formed by joining 11 and 13 = 1113.
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