Pairs of natural numbers whose least common multiple is 78 and the greatest common divisor is 13 are:
1 Crore+ students have signed up on EduRev. Have you? Download the App 
If two positive integers p and q are written as p=a^{2}b^{2} and q=a^{3}b, a,b are prime numbers then verify that L.C.M.(p,q)×H.C.F.(p,q)=pq
Two natural numbers whose sum is 85 and the least common multiple is 102 are:
If p is a positive prime integer, then √p is –
If a is a positive integer and p be a prime number and p divides a^{2}, then
If the HCF of 65 and 117 is expressible in the form 65m – 117, then the value of m is
If x = and y = , then the value of (x^{2} + y^{2}) is
If two positive integers a and b are written as a = x^{3}y^{2} and b = xy^{3}; x, y are prime numbers, then HCF (a, b) is
The least number that is divisible by all the numbers from 1 to 10 (both inclusive) is
Three pieces of timber 42 m, 49 m and 63 m long have to be divided into planks of the same length. What is the greatest possible length of each plank? How many planks are formed?
518 tests

518 tests
