Question

The missing number in the series 40, 120, 60, 180, 90, ?, 135 is

Answer 1

the missing number is 230

Answer 2

Answer:

The missing number is 270.

Step-by-step explanation:

We have been given the numbers 40,120, 60, 180, 90, ?, 135 and we have to find the missing number.

Let us consider the first three numbers 40,120, 60.

The middle number is 120 which is three times of the first number 40 and two times the last number 60

120 = 40×3

120 = 60×2

Similarly the three numbers  60, 180, 90 are in the same form

180 = 60×3

180 = 90×2

Thus, the missing number should be

90×3 = 270

Hence, the missing number is 270.