A solid metal sphere of radius 6 cm is melted and a hollow cylinder of uniform thickness is formed from it. If the external radius of the base of the cylinder is 4 cm and if its height is 72 cms, the uniform thickness of the cylinder (in cm) is

Find the smallest number which when increased by 20 is completely divisible by 12, 20, 15, 18 and 24.

The LCM of the numbers 3.7 and 0.068 is:

Find the Highest Common Factor (HCF) of 372, 732 and 2196.

If the HCF of the expressions (x + 3) (2x² – 3x + a) and (x – 2) (3x² + 10x – b) is x² + x – 6, then what is the value of (2a – 3b) ?

Reduce $$\frac {295} {565}$$​ to lowest form using HCF

The sum of two numbers is 1580 and their LCM is 18816. Find the two numbers.

Find the HCF of 3/4, 5/6, 7/8.

Three bells start ringing after interval of 20 minutes, 25 minutes and 40 minutes. They ring simultaneously at 8:00 am. They will ring simultaneously again at

Three bells start ringing after interval of 20 minutes, 25 minutes and 40 minutes. They ringsimultaneously at 8: 00 am. They will ring simultaneously again at :

The HCF and the LCM of two numbers are 4 and 2600, respectively. If one of the numbers is 104, find the other one.