Product of two coprime numbers is 117, then their LCM is
9
13
39
117
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1
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The sum of two numbers is 528 and their HCF is 33. The number of such pairs is :
Solution 
2
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 
3
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How many numbers are there between 2000 and 4000 which are divisible by 2,3,4 and 5?
Solution 
4
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What is the greatest number which when subtracted from 3000, is exactly divisible by 7, 11 and 13 ?
Solution 
5
Discuss

Three numbers are in ratio 1 : 2 : 3 and HCF is 12. The numbers are:
Solution 
6
Discuss

Which of the following has the most number of divisors?
Solution 
7
Discuss

The product of two numbers is 2028 and their HCF is 13. The number of such pairs is :
Solution 
8
Discuss

(4^{61}+4^{62}+4^{63}+4^{64}) is divisible by
Solution 
9
Discuss

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?
Solution 
10
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 
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