1234, 1235 and 1236.
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32
32 is the smallest two-digit number that can be multiplied by itself to give a four-digit number. (32x32)=1024
113 x 88 = 9944 The highest four-digit number divisible by 88 is 9944.
Only three significant digits are correct, because 5.0 contains no digit for hundredths, and such a digit would be required to give four significant digits in the answer. Because 7 + 5 equals exactly 12, a third significant digit is gained for the answer. Note in contrast that the sum of 7.68 and 0.50 would properly contain four significant digits.
1000