Question : If the 8-digit number 123456xy is divisible by 8, then the total possible pairs of (x, y) are:
Option 1: 8
Option 2: 13
Option 3: 10
Option 4: 11
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Correct Answer: 13
Solution : Given: 123456xy is divisible by 8 Let us take the last 3 digits. So, 6xy is divided by 8. The numbers which divide 8 from 600 to 700 are: 600, 608, 616, 624, 632, 640, 648, 656, 664, 672, 680, 688, 696. Hence, the correct answer is 13.
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