Rojina worked out 90 sums in 1 day. Shefali did 65 sums at the same time. Let's find what percentage of sums Rojina did more than Shefali. Let's find the percentage of sums Shafali did less than Rojina during that period of time.

The sum of two numbers is equal to 80. Three times of the difference of them is 20 more than the greatest number. Find the two numbers.

My age is 'x' Pallabi is 2 years older than me. Let's find the sum of our ages.

The simple interest of a sum of money at the rate of 4% per annum in 3 years is Rs. 303.60. Then find the compound interest of the same principal at the same rate of compound interest in the same period of time.

State whether the following statement is true or false: I. The compound interest of a certain sum of money for a certain period of time at the certain rate of compound interest per annum is less than the simple interest of the same sum of money for the same period of time and at the same rate of interest. II. In the case of compound interest the quantity of principal gradually increases. III. In the case of compound interest, the rate of interest changes every year. IV. In the case of compound interest, the same quantity of interest is obtained in every year. V. In the case of compound interest the obtained interest is proportional to the period of time.

Let’s write down three consecutive integers such that 5 less than the sum of the numbers is equal to 11 more than twice the second number. Let’s find the three consecutive integers.

A two digits number is 3 times of the sum of its digits. If the digits are interchanged, then the number thus obtained is 9 less than 3 times of the original number. Find the number.

Joseph and Kuntal work in a factory. Joseph takes 5 minutes less time than Kuntal to make a product. Joseph makes 6 products more than Kuntal while working for 6 hours. Find the number of products Kuntal makes during that time.

Express the following statements in the form of two simultaneous linear equations in two variables and determine whether these equations are solvable or not by the method of finding the relations among the ratios of the co-efficients of the same variables and the constant terms : The sum of the present ages of your elder sister and your father is 84 years. After 8 years, your father's age will be 2""1/3 times of your elder sister.

A number of two digits is 3 more than 4 times of the sum of its digits. The number, obtained by reversing the position of the two digits is 18 more than the initial number. Find the number.