John was piloting a plane behind a car but was never able to overtake it. Why?

Replace the question mark with the correct number, given the pair of numbers exhibits a similar relationship?

? : 3839 :: 11 : 1209

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

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

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?

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?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

What do you answer even though it never asks you questions?

Two men play a dice game involving roll of two standard dice. Man X says that a 12 will be rolled first. Man Y says that two consecutive 7s will be rolled first. The men keep rolling until one of them wins.

What is the probability that X will win ?

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?