Four bells ring at the intervals of 5, 6, 8 and 9 seconds. All the bells ring simultaneously at some time. They will again ring simultaneously after: 

The product of the LCM and HCF of two numbers is 24. The difference of the two numbers is 2. Find the numbers? 

When a number is divided by 15, 20 or 35, each time the remainder is 8. Then the smallest number is 

A six digit number is formatted by repeating a three digit number: for example, 256, 256 or 678, 678 etc. Any number of this form is always exactly divisible by:

What is the highest common factor of 2x³ + x² -x -2 and 3x³- 2x² + x - 2 ? 

The greatest number, which when subtracted from 5834, gives a number exactly divisible by each of 20, 28, 32 and 35, is 

The H.C.F. of two numbers is 8. Which one of the following can never be their L.C.M? 

The largest 4 - digit number exactly divisible by each of 12, 15, 18 and 27 is :