The product of two numbers is 2028 and their HCF is 13. The number of such pairs is :
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What is the least number which when divided by 5, 6, 7 and 8 leaves a remainder 3, but when divided by 9 leaves no remainder?
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Four bells ring at intervals of 6, 8, 12 and 18 seconds respectively since 12 o’clock. How many times will they ring simultaneously within 6 minutes of the time? (excluding the one at the start)
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3
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The greatest number which on dividing 1657 and 2037 leaves remainders 6 and 5 respectively is
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4
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How many numbers are there between 2000 and 4000 which are divisible by 2,3,4 and 5?
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5
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The H.C.F. and L.C.M. of 0.63, 1.05 and 2.1
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6
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Which of the following has the most number of divisors?
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(4^{61}+4^{62}+4^{63}+4^{64}) is divisible by
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Product of two coprime numbers is 117, then their LCM is
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9
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Which of the following is a pair of coprimes?
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10
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The H.C.F and L.C.M of two numbers are 11 and 385 respectively. If one number lies between 75 and 125 , then that number is
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