Question

Select the number from among the given options that can replace the question mark (?) in the following series.

43, 57, 72, ?, 105, 123

1. 83
2. 102
3. 78
4. 88

Answer 1

Correct Answer - Option 4 : 88

Given series: 43, 57, 72, ?, 105, 123

As we can see in the series

43 + 14 = 57

57 + 15 = 72 

72 + 16 = 88

88 + 17 = 105

105 + 18 = 123 

Hence the correct answer is "88".