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

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

I’m tall when I’m young, and I’m short when I’m old. What am I?

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

Buy me, smell me or deliver me, I do not change.

Who am I?

A few friends are enjoying their sea voyage in a boat full of apples. On the way, they felt hungry and thus decided to eat the apples. Together, they ate two dozen of apples. When they have eaten the apples, will there be any change in the water level?

'S' refers to the number of seconds in a day and 'H' refers to the number of hours in ten years. Which quantity out of these two is greater?

What country can make you shiver?

How many Watermelons are there in the below picture?

A chess tournament is taking place on knock-out terms (the one who loses the match is out of the game).
(a) If 10 matches are played in total, how many players participated?
(b) If 20 players took part in the tournament, how many matches were played?