Question
Find the missing number in the given number series. 2, 5, 12, 23, 38, 57, ?
Solution
ATQ, First differences: 5−2=3, 12−5=7, 23−12=11, 38−23=15, 57−38=19 → 3, 7, 11, 15, 19 Second differences: 4, 4, 4, 4 (constant) Next first difference = 19 + 4 = 23 Next term = 57 + 23 = 80
More Missing Series Questions
- What will come in place of (?) in the following number series problems? 6, ?, 36, 180, 1260, 13860
- What will come in place of the question mark (?) in the following series? 18, 25, 36, 49, 66, ?
- 13, 41, 69, ?, 125, 153Â
- 1290, 1225, 1175, ?, 1112, 1095, 1085
- What will come in place of the question mark (?) in the following series? 11, 13, 19, ?, 51, 81
- 8    12    39      ?       180    216
- Find the missing number in the series: 2, 10, 30, 68, 130, ?
- In each of the following number series, one term is missing. Find the missing term. 121, 100, 81, ?, 49, 36
- 48, 24.5, ?, 39.75, 81.5, 206.25, 621.75
- 25, 30, 50, 60, 80, ?Â
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