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Eleven members of the Middle School Math Club each paid the same amount for a guest speaker to talk about problem solving at their math club meeting. They paid their guest speaker $1−A−2−. What is the missing digit A of this 3-digit number?

Is it ...
0
1
2
3
4


Sagot :

The missing digit is 3.

13
÷
11 = 12

The rest of choices ( 0 to 9) when used as middle digit of the 1 ___ 2 yields repeating decimals.

Example:
A = 4
142 
÷ 11 = 12.90909090...

A = 2
122 ÷ 11 = 11.09090909...

A = 0
102 ÷ 11 = 9.27272727...