Find the wrong number in the series.
1, 2, 6, 15, 31, 56, 91
The difference of the two consecutive numbers are 1, 4, 9, 16, 25, 35.
This is clearly , +12, +22, +32, +42, +52,+62
Here 35 is wrong, So our wrong number is 91
In the following question, select the missing number from the given series.
13, 16, 20, 23, 27, ?
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5, 9, 13, 17, ?
21, 25, 34, 50, ?, 111
Find the value of 6 + 11 + 16 + 21 + 21 + .... + 71.
Find the missing (?) in the series.
9, 4, 16, 6, 36, 9, 81, ?
39, 40, 42, 43, 45, ?
What is the next number in the series
4, 8 , 8, 16, 12, 24, __
17, 20, 23, 26, 29, ?
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