What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

A game is being played where eight players can last for thirty-five minutes. Six substitutes alternate with each player in this game. Thus, all players are on the pitch for the same amount of time including the substitutes.

For how long is each player on the pitch?

John is 45 years older than his son Jacob. If you find similarities between their ages, both of their ages contain prime numbers as the digits. Also, John's age is the reverse of Jacob's age.

Can you find their ages?

What does this rebus riddle mean?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

Manish has to secure 40% marks to pass his B.tech final exams.
He got just 40 marks and failed by 40-marks.

What is the maximum marks?

People make me, save me, change me, raise me. What am I?

At a party, there are five people and a whole round cake lying at the centre of the table. Only four people will make a cut and take their piece and the last one will get the remaining piece on the table. How can they make sure that everyone gets a 1/5th of the piece?

what does the below math rebus puzzle mean?