How many pluses should we put between the digits of 987,654,321 to get a total of 99, and where?

Question

When multiplied by itself, which number is equal to 12,345,678,987,654,321?

A: 1,111,111
B: 111,111,111
C: 11,111,111,111
D: 111,111,111,111

Answer 1

Answer is :

7 addition signs could be used,

9+8+7+65+4+3+2+1 = 99