Three fair coins are tossed in the air and they land with heads up. Can you calculate the chances that when they are tossed again, two coins will again land with heads up?

A man was gazing through the window of the 23rd floor of the building. He suddenly opened the window and jumped on the other side of the window. On landing on the floor, there was not a sheer mark of injury on him.

How can that be possible if he did not use any kind of parachute and did not land on a soft surface?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

Solve below rebus puzzle?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

What goes through cities and fields, but never moves?

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

I have branches, but no fruit, trunk or leaves. What am I?

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?