Question
The sum of any seven consecutive natural numbers is
always divisible by which of the following numbers?Solution
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.
Find the wrong number in the given number series.
41, 51, 63, 80, 101, 126
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137, 148, 190, 261, 361, 490- Find the wrong number in the given number series.
91, 103, 125, 163, 211, 271 Find the wrong number in the given number series.
15, 38, 67, 98, 135, 181
850, 849, 841, 814, 750, 688
Direction: Find the wrong number in given number series.
1977, 1945, 1837, 1575, 1081, 217.
- Find the wrong number in the given number series.
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Find the wrong number in the given number series.
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