Find the wrong number in the series. Series: 7, 8, 18, 57, 228, 1165, 6996
2023
Find the wrong number in the series.
Series: 7, 8, 18, 57, 228, 1165, 6996
- A.
7
- B.
8
- C.
228
- D.
6996
Attempted by 232 students.
Show answer & explanation
Correct answer: C
Correct answer: 228
The pattern is: multiply the previous term by the next natural number and then add the same number.
7 × 1 + 1 = 8
8 × 2 + 2 = 18
18 × 3 + 3 = 57
57 × 4 + 4 = 232, but the series gives 228.
With 232 in that place, the next terms are 232 × 5 + 5 = 1165 and 1165 × 6 + 6 = 6996.
Final answer: 228 is the wrong number.