Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

When we see 2 but call 10?

A number with an interesting property:

When I divide it by 2, the remainder is 1.
When I divide it by 3, the remainder is 2.
When I divide it by 4, the remainder is 3.
When I divide it by 5, the remainder is 4.
When I divide it by 6, the remainder is 5.
When I divide it by 7, the remainder is 6.
When I divide it by 8, the remainder is 7.
When I divide it by 9, the remainder is 8.
When I divide it by 10, the remainder is 9.

It's not a small number, but it's not really big, either.
When I looked for a smaller number with this property I couldn't find one.

Can you find it?

Can you divide the below-given shape into four equal and identical pieces?

Mr Black, Mr Gray, and Mr White are fighting in a truel. They each get a gun and take turns shooting at each other until only one person is left. Mr Black, who hits his shot 1/3 of the time, gets to shoot first. Mr Gray, who hits his shot 2/3 of the time, gets to shoot next, assuming he is still alive. Mr White, who hits his shot all the time, shoots next, assuming he is also alive. The cycle repeats. If you are Mr Black, where should you shoot first for the highest chance of survival?

Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

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