75% of a number is added to 75, then the result is the number itself. What is the number?

The number of marble slabs of size 20cm x 20 cm required to pave the floor of a square room of side 3 metres is :

A vendor bought 3 chocolates for 1 rupee. For how much per chocolate should he sell, to gain a profit of 50%?

Another name of variable line spacer is :

If P denotes ÷, Q denotes ×, R denotes +, and S denotes –, 

18 Q 12 P 4 R 5 S 6 = ?

Find out the odd man from the given words: