I'm pretty sure it's 27
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The first (left most) digit is the number of tens and the other is the number of ones. So 57 = 5 tens plus 7 ones = 50 + 7 = 57
The number with 7 tens has 70. Since it has 6 less ones than tens, it has 7 - 6 = 1 one. Therefore, the number is 70 + 1, which equals 71.
well 7 tens is 70 and 8 tens is 80 and the number containts 4 ones so it would be 74.
709
So far, you know that your number has a seven in the tens column:7?The ones digit is one more than the tens digit, which is 7.7+1=8Your number is 78.