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Question Detail
20, 19, 17, (...) , 10, 5
- 16
- 12
- 15
- 14
Answer: Option D
Explanation:
Pattern in the series is -1, -2, .., .. , -5
So next term will be 17 - 3 = 14
1. Complete the series 2,2,5, 13,28,....
- 50
- 51
- 52
- 53
Answer: Option C
Explanation:
\begin{aligned}
\text{Pattern is }\\
+1^2-1, +2^2-1, +3^2-1,+4^2-1 \\
5^2-1 = 28 + 24 \\
= 52
\end{aligned}
2. Look at this series: 22, 21, 23, 22, 24, 23, ... What number should come next?
- 25
- 26
- 27
- 28
Answer: Option A
Explanation:
Please look carefully at the series, its pattern is,
-1, +2, -1, +2, -1, so next will be +2
23+2 = 25
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. 4, 10, (?), 82, 244, 730
- 26
- 28
- 40
- 48
Answer: Option B
Explanation:
Each number in the series is the preceding number multiplied by 3 and then decreased by 2.
5. 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}
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