What is the unit digit in 27^20?
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A girl multiplies 987 by a certain number and obtains 559981 as her answer. If in the answer, both 9’s are wrong but the other digits are correct, then the correct answer will be
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(12)3 x 64 ÷ 432 = ?
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The difference between a positive proper fraction and its reciprocal is 9/20. The fraction is:
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The smallest value of n, for which 2n+1 is not a prime number, is
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A six-digit number is formed by repeating a three-digit number; for example, 256256 or 678678 etc. Any number of this form is always exactly divisible by :
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Which one of the following numbers is exactly divisible by 11?
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(?) + 3699 + 1985 - 2047 = 31111
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106 X 106 - 94 X 94
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A number is divided by 221, the remainder is 64. If the number be divided by 13 then the remainder will be
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What should be the maximum value of Q in the following equation?
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