Question

If the difference of the squares of two consecutive odd numbers is 40 , then one of the number is :

• A. 13
• B. 9
• C. 15
• D. 17

Answer 1

Answer:

B. 9

Two consecutive odd number be, x, x+2 Squares are x², (x+2)² Difference=(x+2)² -x² x²+4x+4-x²=40 4x =36 x = 36/4 = 9