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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1
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Which of the following has the most number of divisors?
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2
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Product of two coprime numbers is 117, then their LCM is
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3
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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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4
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The L.C.M. of two numbers is 48. The numbers are in the ratio 2:3. Then sum of the number is:
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5
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The LCM and HCF of two numbers are 84 and 21, respectively. If the ratio of the two numbers is 1 : 4, then the larger of the two numbers is
SolutionAnswer 84 
6
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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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7
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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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8
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The greatest number which on dividing 1657 and 2037 leaves remainders 6 and 5 respectively 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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