Exercise"Everything you can imagine is real."
- Pablo Picasso
|
Insert the missing number.
|
| 1. |
16, 33, 65, 131, 261, (....)
|
Answer: Option E
Explanation:
Each number is twice the preceding one with 1 added or subtracted alternatively.
So, the next number is (2 x 261 + 1) = 523.
|
| 2. |
10, 5, 13, 10, 16, 20, 19, (....)
|
Answer: Option C
Explanation:
There are two series (10, 13, 16, 19) and (5, 10, 20, 40), one increasing by 3 and the other multiplied by 2.
|
| 3. |
1, 4, 9, 16, 25, 36, 49, (....)
|
Answer: Option C
Explanation:
Numbers are 12, 22, 32, 42, 52, 62, 72.
So, the next number is 82 = 64.
|
| 4. |
2, 4, 12, 48, 240, (....)
|
Answer: Option E
Explanation:
Go on multiplying the given numbers by 2, 3, 4, 5, 6.
So, the correct next number is 1440.
|
| 5. |
8, 7, 11, 12, 14, 17, 17, 22, (....)
|
Answer: Option A
Explanation:
There are two series (8, 11, 14, 17, 20) and (7, 12, 17, 22) increasing by 3 and 5 respectively.
|
|
|
