Which of the following is a pair of coprimes?
(14,35)
(18,25)
(31,93)
(32,62)
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1
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Find the greatest number that will divide 55, 127 and 175 so as to leaves the same remainder in each case
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2
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What is the greatest number which when subtracted from 3000, is exactly divisible by 7, 11 and 13 ?
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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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Which of the following has the most number of divisors?
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5
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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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6
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Find the LCM of 2/3, 3/5, 4/7 and 9/13.
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7
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Three numbers are in ratio 1 : 2 : 3 and HCF is 12. The numbers are:
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8
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The product of two numbers is 2028 and their HCF is 13. The number of such pairs is :
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9
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The LCM of two numbers is 495 and their HCF is 5. If the sum of the numbers is 100 then their difference is:
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10
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The H.C.F. and L.C.M. of 0.63, 1.05 and 2.1
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