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A boy added all natural numbers from 1 to 10, however he added one number twice due to which the sum becomes 58. What is the number which he added twice?

A3

B8

C4

D7

Answer:

A. 3

Read Explanation:

number he added twice = x Sum of all natural numbers from 1 to 10, = 10 × (10 + 1)/2 = 55 55 + x = 58 x = 3 The number he added twice = 3


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