Question
Find the sum of the first 40 natural
numbers.Solution
Sum of first 'n' natural numbers = n(n + 1) ÷ 2
Required sum = 40 × (40 + 1) ÷ 2 = 40 × 41 ÷ 2 = 820
More No. System Questions
420Â Â Â Â 342Â Â Â Â Â 272Â Â Â Â Â 212Â Â Â Â Â 156Â Â Â Â 110
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18, 34, 66, 114, 178, 266 - Find the wrong number in the given number series.
12, 21, 5, 38, 2, 71 Â -2, 0, 8, 32, 64, 66
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13, 24, 17, 28, 21, 40 Find the wrong number in the given number series.
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