In a school there are 2000 students. On January 2nd, all the students were present in the school except 4% of the boys and on January 3rd, all the students are present in the school except 28/3% of the girls, but on both the days' number of students present in the school, were same. The number of girls in the school is –

Mahadev covered some distance at some speed. If he traveled a distance of 3 km / h more, it took him 40 minutes less time. If he had covered the distance at a speed of 2 km / h less, he would have taken 40 minutes more. The distance (in km) is

The single discount which is equivalent to three successive discounts of 25%, 20% and 10% is-

If price of the table is increased by 25%, then a person can buy 25 table less for Rs 25000. What is the original price (in Rs) of the table?

Vishnu travelled equal distances at speeds of 10 km/hr, 30 km/hr and 8 km/hr and took a total of 15.5 minute to complete. Find the total distance he travelled in km.

Three numbers are in the ratio of 3:5:10 and their LCM is 630. Find their HCF.

A person invested Rs 3000 on compound interest for two years. If the rate of interest is the 25 % for the first year and 20 % for the second year. Then find the CI?

$$ {3sin60°-4sin^{3}60°=?}$$