Question

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?

• A. 3
• B. 8
• C. 4
• D. 7

Answer 1

Answer:

A. 3

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