Question

1+2+3+4+5+6+7+8+9+1+2+3+4+5+6+7+8+9 times 0

Answer 1

Explanation:

1+2+3+4+5+6+7+8+9+1+2+3+4+5+6+7+8+9 times 0

2(1+2+3+4+5+6+7+8+9)times 0

Here n = 9

Sum of n natural numbers is given as:

`2 * (n(n + 1))/(2) * 0 \\ \\ = 2 * (9 * 10)/(2) \\ \\ = 9 * 10 * 0 \\ \\ = 90 * 0 \\ \\ = 0`

Answer 2

0, because anything multiplied by 0 is 0.