List of top Mathematics Questions on LCM and HCF

The HCF of 306 and 657 is
The product of two numbers is 4840. If the first number is two fifth of the second number, then what is the first number?
The sum of two numbers is 40 and their HCF is 8. How many pairs of numbers satisfy both the conditions?
Find the sum of the fourth proportional of 60, 24, 15 and the mean proportional of 5 and 20.
The H.C.F. of 7, 8, 9 is
The product of LCM and HCF of any two expression is x-xy+xy-y first expression is (x2+y2) then the second expression will be:
The sum of exponents of the prime factors in the prime factorization of 196 is
The product of two numbers is 30. If their HCF is 5, then LCM is
The HCF and LCM of 48, 72 and 60 are
The traffic lights at three different road crossings change after every 48 sec., 72 sec. and 108 sec., respectively. If they all change simultaneously at hours 8:20:008:20:00, then at what time will they again change simultaneously ?
The sum of two numbers is 462 and their highest common factor is 22. What is the maximum number of pairs that satisfy these conditions?
The LCM of two numbers is 280 and their ratio is 7: 8. The two numbers are
HCF of 3240, 3600 and a third number is 36 and their LCM is 24 x 35 x 52 x 72. The third number is
If two numbers are in the ratio 6:13 and their least common multiple is 312, then the sum of the numbers is