We have four gears with below features=> Both Gear A and D has 60 teeth=> Gear B has 40 teeth=> Gear C has 20 teeth=> Every two minutes, Gear B makes 25 full turns.What is the relative speed of Gear A and Gear B?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

what's the probability of getting a king or a queen from a pack of 52 cards?

Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?

Imagine you are in a room with no windows or doors. How will you get out?

How many times in a given day, minutes and hour clock comes in a straight line ?

What kind of storm is always in a rush?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

What's the best place to go shopping in the ocean?

Can you find out which triangle will have a bigger area among the following?
1. A triangle with sides 300, 400 and 500
2. A triangle with sides 300, 400 and 700