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Let the numbers are 'n', 'n + 1', 'n + 2', 'n + 3', 'n + 4', 'n + 5' and 'n + 6'.
Required sum = n + (n + 1) + (n + 2) + (n + 3) + (n + 4) + (n + 5) + (n + 6)
= (7n + 21)
= 7(n + 3)
So, the sum is always divisible by 7.
124, 186, 375, 930, 2790, 9765
547, 594, 640, 691, 741, 792
16 18 25 52 116 241 457
Find the wrong number in given number series.
2835, 3460, 3335, 3360, 3354, 3356
134, 138, 132, 142, 126, 146, 122
14, 16, 22, 46, 172, 886
132, 130, 136, 126, 142, 110
5, 32, 16, 140, 105, 448
6 9 14 22 30 41
...