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The H.C.F of two 9/10,12/25,18/35 and 21/40 is:

$ \dfrac{3}{5} $
$ \dfrac{252}{5} $
$ \dfrac{3}{1400} $
$ \dfrac{63}{700} $
Explanation:

Required H.C.F. =$ \dfrac{H.C.F. of 9, 12, 18, 21}{L.C.M. of 10, 25, 35, 40} $=$ \dfrac{3}{1400} $

Additional Questions

If the sum of two numbers is 55 and the H.C.F. and L.C.M. of these numbers are 5 and 120 respectively, then the sum of the reciprocals of the numbers is equal to:

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Which of the following has the most number of divisors?

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The least number which when divided by 5, 6 , 7 and 8 leaves a remainder 3, but when divided by 9 leaves no remainder, is:

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Three numbers which are co-prime to each other are such that the product of the first two is 551 and that of the last two is 1073. The sum of the three numbers 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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The least multiple of 7, which leaves a remainder of 4, when divided by 6, 9, 15 and 18 is:

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What is the HCF of 2.04, 0.24 and 0.8 ?

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The G.C.D. of 1.08, 0.36 and 0.9 is:

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The product of two numbers is 2028 and their H.C.F. is 13. The number of such pairs is:

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The H.C.F of two 9/10,12/25,18/35 and 21/40 is:

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