Exercise"I never see what has been done; I only see what remains to be done."
- Marie Curie
|
Find out the wrong number in the series.
|
| 1. |
7, 8, 18, 57, 228, 1165, 6996
|
Answer: Option C
Explanation:
Let the given numbers be A, B, C, D, E, F, G.
Then, A, A x 1 + 1, B x 2 + 2, C x 3 + 3, D x 4 + 4, E x 5 + 5, F x 6 + 6 are the required numbers.
Clearly, 228 is wrong.
|
| 2. |
1, 1, 2, 6, 24, 96, 720
|
Answer: Option C
Explanation:
Go on multiplying with 1, 2, 3, 4, 5, 6 to get next number.
So, 96 is wrong.
|
| 3. |
196, 169, 144, 121, 100, 80, 64 |
Answer: Option C
Explanation:
Numbers must be (14)2, (13)2, (12)2, (11)2, (10)2, (9)2, (8)2.
So, 80 is wrong.
|
| 4. |
445, 221, 109, 46, 25, 11, 4
|
Answer: Option B
Explanation:
Go on subtracting 3 and dividing the result by 2 to obtain the next number.
Clearly, 46 is wrong.
|
| 5. |
190, 166, 145, 128, 112, 100, 91 |
Answer: Option A
Explanation:
Go on subtracting 24, 21, 18, 15, 12, 9 from the numbers to get the next number.
190 - 24 = 166
166 - 21 = 145
145 - 18 = 127 [Here, 128 is placed instead of 127]
127 - 15 = 112
112 - 12 = 100 ... and so on.
Therefore, 128 is wrong.
|
|
|
