The centre of the third figure is empty. What digit should fit inside?

People make me, save me, change me, raise me. What am I?

Keyboard words are not in alphabetical order, Why?

Sachin bought a car with a strange 5 digit numbered plate.The water image of the number is 78633 more than my car number. All the digits of car number are distinct.

What is the original number on number plate?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

There is a brick of gold and a brick of iron in a boat (both 10-inch blocks), if they are both dropped into the water which will make the water level higher?

John can eat 27 chocolates in an hour, Jacob can eat 2 chocolates in 10 minutes, and Jolly can eat 7 chocolates in 20 minutes. How long will it take them to share and eat a box of 120 chocolates whilst playing Chess?

A man hijacks an aeroplane transporting both passengers(8 of them) and valuable cargo. After taking the cargo, the man demands nine parachutes, puts one of them on, and jumps, leaving the other eight behind. Why did he want eight?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?