Product of two coprime numbers is 117, then their LCM is
9
13
39
117
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1
Discuss

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 
2
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Three numbers are in ratio 1 : 2 : 3 and HCF is 12. The numbers are:
Solution 
3
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(4^{61}+4^{62}+4^{63}+4^{64}) is divisible by
Solution 
4
Discuss

HCF of 3240, 3600 and a third number is 36 and their LCM is 2^{4}×3^{5}×5^{2}×7^{2} Then the third number is
Solution 
5
Discuss

The LCM of two numbers is 495 and their HCF is 5. If the sum of the numbers is 100 then their difference is:
Solution 
6
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The H.C.F. and L.C.M. of 0.63, 1.05 and 2.1
Solution 
7
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Find the LCM of 2/3, 3/5, 4/7 and 9/13.
Solution 
8
Discuss

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)
Solution 
9
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The product of two numbers is 2028 and their HCF is 13. The number of such pairs is :
Solution 
10
Discuss

Find the greatest number that will divide 55, 127 and 175 so as to leaves the same remainder in each case
Solution 
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