Question

Number of integral points insides the triangle formed by points (0, 0) (10, 0) (0, 10) are

• A. 35
• B. 36
• C. 40
• D. None

Answer 1

Answer: (B)

36

Answer 2

8 + 7 + 6 + 5 + 4 + 3 + 2 + 1

Sn = $\frac{n(n + 1)}{2}$ = $\frac{8 \times 9}{2}$ = 36