Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

Below is the sum of symbols in each row and column in the figure. Analyzing the figure, can you find out the value of the symbols?

In a school, 280 students studied chemistry, 254 students studied physics and 280 students studied biology.

97 students studied chemistry as well as physics, 138 students studied physics as well as biology and 152 students studied chemistry as well as biology.

73 students studied all the three branches.

Can you find out the total number of students?

Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?

I am dry when I go inside, but wet when I am pulled outside.
The longer I am inside, the stronger I get
When I am completely out, I am wet and I literally sag
Who am I?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

Which is faster, Heat or Cold ? Explain.

One night, a man runs away from home. He turns left and keeps running. After some time he turns left again and keeps running. Later, he turns left one more time and runs back home—but when he gets home, he finds a man in a mask. Who was the man in the mask?

I look at you, you look at me, I raise my right, you raise your left. What am I?