Twice the difference between two numbers is equal to their sum. If one number is 15, find the other number.

Divide 50 into two parts so that the sum of their reciprocals is   $${1\over 12} $$

Which one of the following represents the number' eleven thousand eleven hundred eleven'?

Two numbers, of which the first number is 200% of the second number. If the sum of the squares of the first number and the cube of the second number is 5 times the product of both numbers, find the difference between the two numbers?

If the sum of a number and its reciprocal be 2, then the number 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.

In a division sum, the divisor is ten times the quotient and five times the remainder. If the remainder is 46, find the dividend.

If the 5-digit number 535ab is divisible by 3, 7 and 11, then what is the value of (a² - b² + ab)?