Students are sitting in a row in which the position of X is 17th from the left and that of Y is 14th from theright. If they interchange their positions, X’s position becomes 7th from the left. How many students are there in the row?

The value of $$122 + 345 - 3 \div 1116 \times 372 $$ is : 

Which of the following is the prime number series from 1 to 20?

Umar and Avinash started a partnership with investments of ₹ 10,000 and ₹ 15,000, respectively but due to a financial emergency the latter had to withdraw his investment after 8 months. In whatratio should the profit of the first twelve months be shared among the duo?

Kaushik bought a toy for ₹ 160 and sold it for ₹ 180. The rate of profit was ......%