The sum of 18 consecutive natural numbers is a perfect square. The smallest possible value of this sum is :

The sum of 18 consecutive natural numbers is a perfect square.What is the smallest possible value of this sum? (a) 169 (b) 225 (c) 289 (d) 441

The sum of thirty-two consecutive natural numbers is a perfect square. What is the least possible sum of the smallest and the largest of the thirty-two numbers?

The sum of two consecutive natural numbers is 61. The numbers are

The sum of two consecutive triangular numbers is a square number.

The sum of three consecutive odd natural numbers is 87. The smallest of these numbers is :