If the number 653ab is divisible by 90, then (a + b) = ?
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If x and y are the two digits of the number 653xy such that this number is divisible by 80, then x + y = ?
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2
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What is the number in the unit place in (729)59?
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3
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(?) + 3699 + 1985 - 2047 = 31111
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4
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How many of the following numbers are divisible by 3 but not by 9. 4320, 2343, 3474, 4131, 5286, 5340, 6336, 7347, 8115, 9276
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5
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The difference between a positive proper fraction and its reciprocal is 9/20. The fraction is:
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6
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3897 X 999
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7
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Which of the following is a prime number ?
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8
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72519 X 9999
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9
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The smallest 3 digit prime number is:
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10
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(935421 x 625) = ?
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