Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

You have a roll of cloth 1km long. You have a machine which cuts this roll into pieces of 10-meter-long cloth.

How long would it take for the machine to cut the roll if each cut took 4 secs?

A large water tank has two inlet pipes (a large one and a small one) and one outlet pipe. It takes 3 hours to fill the tank with the large inlet pipe. On the other hand, it takes 6 hours to fill the tank with the small inlet pipe. The outlet pipe allows the full tank to be emptied in 9 hours.

What fraction of the tank (initially empty) will be filled in 0.64 hours if all three pipes are in operation? Give your answer to two decimal places (e.g., 0.25, 0.5, or 0.75).

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

What number divided by 4 is the same as that number minus 4?

Krish is 45 years old and his mother Crishtina is 73 years old.

Can you find out how many years ago, his mother was three times his age?

Rectify the following equality 101 - 102 = 1 by moving just one digit.

All of Jacob's shoes are red except two.
All of Jacob's shoes are green except two.
All of Jacob's shoes are yellow except two.

How many shoes does Jacob have?

What is the largest number you can write with just 3 digits?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?