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

Spot what is wrong here in below Picture?

An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?

What do you see in the image below

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

Six glasses are in a row. The first three are filled with milk and the last three are empty. By moving only one glass, can you arrange them so that the full and the empty glasses alternate?

A horse was tied to a rope 5 meters long and the horses food was 15 meters away from the horse. How did the horse reach the food?

What does this rebus means ?

PROG WORKRESS

John is the son of Jacob.
So,
Jacob is the_____of John's father?