Find the wrong number in the series? 3, -6, 12, -24, 46, -96.
2023
Find the wrong number in the series?
3, -6, 12, -24, 46, -96.
- A.
46
- B.
12
- C.
16
- D.
24
Attempted by 127 students.
Show answer & explanation
Correct answer: A
Key insight: each term is obtained by multiplying the previous term by -2.
Compute the sequence using the pattern: 3 × -2 = -6; -6 × -2 = 12; 12 × -2 = -24; -24 × -2 = 48; 48 × -2 = -96.
Compare with the given series: 3, -6, 12, -24, 46, -96. The fifth term should be 48 but the series shows 46.
Conclusion: 46 is the wrong number because it breaks the multiply-by--2 pattern; the correct fifth term is 48.