What does this rebus means ?

John drives to his office at 20km/hr. After reaching the office, he realizes that today is a holiday. He went back at an average speed of 30km/hr. Discounting the time spent in the stoppage what was the average speed of his journey?

Jigsaw captured 100 people and make them stand in a circle and all these people are labelled as Person1, Person2, Person3... Person100. He made them play a crazy game in which Person 1 shot Person 2 and pass the gun to the next person and so on until one stands alive.

Which person will survive in the end?

In the attached figure, you can see a chessboard and two rooks placed on the chess board. What you have to find is the number of squares that do not contain the rooks. How many are there?

Name a key which is hardest to turn.

By what process could you make a 'Tea-Table' into food?

Only one colour, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

Can you Find and name the hidden bird in the picture below ?

Replace each alphabet with the number (1-9) to make the below equation correct.

AB * C = DE - F = GH / I