The sum of first 45 natural numbers is:
1035
1280
2070
2140
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1
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If n is a natural number, then (6n2 + 6n) is always divisible by:
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2
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If p and q are the two digits of the number 653pq such that this number is divisible by 80, then p+q is equal to :
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3
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Which of the following number should be added to 11158 to make it exactly divisible by 77?
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4
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What least number must be added to 1056, so that the sum is completely divisible by 23 ?
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5
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35 + 15 X 1.5
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6
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Which one of the following numbers is exactly divisible by 11?
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7
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106 X 106 - 94 X 94
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8
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The difference between a positive proper fraction and its reciprocal is 9/20. The fraction is:
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9
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Find the sum to 200 terms of the series 1 + 4 + 6 + 5 + 11 + 6 + ....
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10
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How many numbers between 190 and 580 are divisible by 4,5 and 6?
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