Question

If the sum of squares of 3 consecutive natural numbers is 149, then the sum of these 3 numbers is:

• A. 21
• B. 32
• C. 18
• D. 28

Answer 1

Answer:

A. 21

Numbers are x-1, x , x+1 (x-1)² + x² +(x+1)²= 149 x²-2x+1+x²+x²+2x+1=149 3x² +2=149 3x²=149-2=147 x²= 147/3=49 x=7 Number 6, 7, 8 Sum = 6+7+8=21