Question

A child was asked to add first few natural numbers(that is 1+2+3...) so long his patience permitted. As he stopped , he gave the sum as 575. When the teacher declared the result wrong, the child discovered he had missed one number in the sequence during the addition. The number he missed was A) less than 10 B) 10 C) 15 D) more than 15

Answer 1

the number he missed was D) more than 15