Two numbers are respectively 30% and 40% less than a third number. What percent is the first number of the second?

If the 5 digit number 538xy is divisible by 3, 7 and 11, then the value of (x² +y²)  is:

Let x be the least number divisible by 13, such that when x is divided by 4, 5, 6, 7, 8 and 12, the remainder in each case is 2. The sum of the digits of x is:

Find the maximum number of students among them 1001 pens and 910 pencils can be distributed in such a way that each student gets the same number of pens and same number of pencils.

When 3738, 5659 and 9501 are divided by the greatest possible number x, the remainder in each case is y. What is the sum of x and y?

(444% of 521) ÷972=?

$$ \sqrt{749}×0.56+14.38=?$$

1332.89+171.928+17.01 +?²=1690.87