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

Can you count the number of squares in the given picture?

What has no start, end, or centre?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

Which is the smallest number that you can write using all the vowels exactly once?

What can go up a chimney down, but can’t go down a chimney up?

Can you find the largest Three-digit number whose sum is 14 and whose square is less than 5,00,000?

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

Two natural numbers have a sum of less than 100 and are greater than one.

John knows the product of the numbers and Jacob knows the sum of numbers.

The following conversation takes place between them:
John: 'I am not aware of those numbers.'
Jacob: 'I knew you wouldn't be. I am not aware myself.'
John: 'Now I know them!'
Jacob: 'Now I know them, too!'

What are the two numbers?

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?