Quantitative Aptitude - Arithmetic Ability Questions

A car moves at a speed of 72 km/hr after repairing and moves at the speed of 54 km/hr before repairing. It covers X distance in 6 hours after repairing. How much time (inhours) will it take to cover 3X distance before repairing?

If 4(x+y) = 256 and (256)(x-y) = 4, then what is the value of x and y?

If 25% of X is equal to 40% of Y, then what is the ratio of X and Y?

The product of two 2-digit numbers is 2160 and their H.C.F. is 12. The numbers are

If 6 years are subtracted from the present age of Ayush and takes 25% of that then we get the present age of his only son. 4 years ago, his daughter’s age is 7 years more than his son. Sum of daughter’s present age and his wife’s present age is 10 years more than Ayush’s present age then find the present age of Ayush if average of present age of entire family is 30.25 yr? 

Find the least common multiple of 15 and 12?

When a discount of 20% is given on a pizza, the profit is 32%. If the discount is 18%, then the profit is

A trader had 960 kgs of rice. He sold a part of it at 20% profit and the rest at 8% profit, so that he made a total profit of 12%. How much rice (in kgs) did he sell at 8% profit?