The magnetic field produced due to a circular coil

The greatest number of four digits which when divided by 5, 8, 11 leave remainders 2, 4, 6 respectively is:

The LCM of two numbers is 4 times of their HCF. The sum of LCM and HCF is 320. If one of the number is 256, then the other number is:

Find the LCM of the numbers 1.2, 0.8, 2.4, and 3.6.

The HCF of two numbers is 21. Which of the following can never be their LCM?

What is the least number which is a perfect square and divisible by 3, 10, 12, and 15?

Find the LCM of x² – 8x + 15 and x² – 5x + 6 is. 

The HCF of two numbers is 17. If their product is 867, then how many such pairs exist?

The least number which when divided by 4, 6, 10 and 12 leave zero remainder in each case and when divided by 13 leaves a remainder of 8 is:

What is the least number which when divided by 3, 15 & 18 leave a remainder 6 in each case & it is also divisible by 12?

The ratio of two number is 6 : 5 and their HCF is 15. So find and their LCM?