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

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

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

There are three Athletes (John, Tarun and Harish) and their individual Coaches (Jacob, Meenaxi and Priyanka) standing on the shore.
No Coach trusts their Athlete to be near any other Coach unless they are also with them.
There is a boat that can hold a maximum of two persons.
How can the six people get across the river?

Count The number of F's in the paragraph below:

"FINISHED FILES ARE THE RESULT OF YEARS OF SCIENTIFIC STUDY COMBINED WITH THE EXPERIENCE OF YEARS"

You need to arrange three 7 and mathematical symbols to form number 1?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

Here is a Swiss Cross. You have to make two straight cuts in the figure so that it is divided into four congruent pieces. Also, you should be able to join these pieces into a square then. Can you accept this challenge?

Thirty friends were on a hiking trip when they decided to enjoy the bonfire. They assembled for it and agreed to play a game. For that, they divided themselves into five teams with seven members each, forming five rows.

How did they manage to achieve this formation?

By using 'because' continuously three times, can you make an English statement ?