Akshay has 30 articles, each having the same cost price. He marked the price of each article at 30% above its cost price. He sold 15 of the articles at a discount of 20% each, and the remaining 15 articles at a discount of 10% each, thereby gaining a total profit of ₹630. What was the cost price of each article?

A train travelling at a constant speed crosses a pole in 12 seconds whereas cross a tunnel 198 metre long in 30 seconds. Find the length of train.

Cost of 36 pens and 42 Pencils is Rs 460. What is the cost of 18 pens and 21 pencils?

Find the sum of the factors of 3240

Out of 5 men and 3 women. committee of 3 members is to be formed so that it has 1 woman and 2 men. In how many different ways can it be done? 

Divide Rs. 7,500 among A, B and C such that A’s share to B’s share is in the ratio 5:2 and B’s share to C’s share is in the ratio 7 : 13. How much will B receive ?

The area of two equilateral triangles are in the ratio 25 : 36 . Their altitudes will be in the ratio: