Find the wrong number in the series : 7, 8, 18, 57, 228, 1165, 6996
2020
Find the wrong number in the series :
7, 8, 18, 57, 228, 1165, 6996
- A.
1165
- B.
228
- C.
57
- D.
18
Attempted by 13 students.
Show answer & explanation
Correct answer: B
The intended pattern is: multiply by 1 and add 1, multiply by 2 and add 2, multiply by 3 and add 3, and so on. After 57, the next term should be 57 x 4 + 4 = 232, not 228. Therefore 228 is the wrong number.