The least number, which when divided by 4, 5 and 6 leaves remainder 1, 2 and 3 respectively is:

If the product of two numbers is 4941 and their LCM is 81, then their HCF is:

Three men step off together from the same spot. Their steps measure 63 cm, 70 cm and 77 cm respectively. The minimum distance each should cover so that all can cover the distance in complete steps is 

The product of two numbers is 2028 and their HCF is 13. The number of such pair is-

Find the L.C.M of $$ {6x}{y^{2}z},{8x^{2}{y^{3}z^{2},{12{x^{3}{y^{3}z^{3}}}}}}$$.

If (x + k ) is the common factor of x² + ax + b and x² + cx + d , then what is k equal to ?

If the students of a class can be grouped exactly into 6 or 8 or 10, then the minimum number of students in the class must be. 

The least multiple of 7, which leaves the remainder 4, when divided by any of 6, 9, 15 and 18, is