Factorised form of is

Anup is four times as old as his son. If the sum of their ages is 50, find their ages.

One side of a rectangle is 4cm shorter than three times the other side. Find the sides if the perimeter of the rectangle is 48cm.

Factorise:   5 - 2x - 6xy + 15y

Solve   

Sum of the digits of a two digit number is 9. When we interchange the digits, it is found that the resulting two digit new number is greater than the original number by 27. Then the two digit number is

Factorize:  

The sum of two numbers is 2490. If 6.5% of one number is equal to 8.5% of the other, the numbers are ______________

If the three numbers are in the ratio 2:3:5, so that the sum of their squares is 608. Find the numbers respectively.

A group of stuydents decided to buy a tape recorder from 170 to 195 ruppes.But at the last moment two students backed out of the decision so that the remaining students had to pay 1 rupee more than they had planned,  The price of the tape recorder if each student paid equal shares is: