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What will come in place of question mark (?) in the given number series ?
Solution
The difference between the difference of each term are consecutive odd numbers.
40-29 = 11
58-40=18
85-58=27
Difference of difference
18-11=7
27-18 = 9
Hence the difference between 29 and the missing term must be 6 so that the difference of difference is 5.
The missing number is 23.
29-23=6
and the difference of difference is 11-6=5.It completes the series.
Hence Option A is the correct answer.
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