Find a number such that its square is 21 more than four times the original number.

Which number has 121 as its square:

A number consists of two digits.Sum of its digits is 15.If the place of digits are interchanged then the number so obtained is 9 less than the original number. Find the original number.

Find a number, such that one-fourth of the number is 3 more than 7.

The digits of a positive integer, having three digits, are in A.P. and their sum is 15. The number obtained by reversing the digits is 594 less than the original number. Find the number.

The difference of squares of two numbers is 180. The square of the smaller number is 8 times the larger number. Find the two numbers.

Form the pair of linear equations in the following problems and find their solutions (if they exist) by any algebraic method :-The sum of a two-digit number and the number formed by interchanging the digits is 110. If 10 is subtracted from the first number, the new number is 4 more than 5 times the sum of the digits in the first number. Find the number

Write a number 3 more than y.

One of the two digits of a two - digit number is three times the other digit.If you interchange the digits of this two-digit number and add the resulting number to the original numer , you get 88.What is the original number ?

Champa went to a ‘Sale' to purchase some pants and skirts, When her friends asked her how many of each she had bought, she answered. "The number of skirts is two less than twice the number of pants purchased. Also, the number of skirts is four less than four times the number of pants purchased". Help her friends to find how many pants and skirts Champa bought.