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ANTONII [103]
3 years ago
11

Eleven members of the Middle School Math Club each paid the same amount for a guest speaker to talk about problem solving at the

ir math club meeting. They paid their guest speaker $1−A−2−. What is the missing digit A of this 3-digit number?
Mathematics
1 answer:
romanna [79]3 years ago
6 0
So, it's a 3 digit number that is divisible by 11, and starts with a 1, and ends with a 1.

each of them paid the same amount, let's say y and we know that if we multiply this y by 11, we'll have a number with a "2" at the end: so the last digit of y must be 2, since only 2*1=2

also, the first digit of y must be 1, since the first digit of the 3-digit number is 1.

so lets try what happens if they all pay 12 dollars? the sum is 132, so A must be 3!!!
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