Advertisement

### Question

In the following number series, one of the numbers does not fit into the series. Find the wrong number.

1, 2, 6, 24, 120, 620, 5040

**A**

5040

**B**

620

**C**

120

**D**

24

**Soln.**

**Ans: b**

Number 620 is wrong and should be replaced by 720. The series is: 1 X 2 gives 2, then 2 X 3 gives 6, then 6 X 4 gives 24, then 24 X 5 gives 120, then 120 X 6 should give 720, not 620.