In which direction should the missing arrow point?

A donkey is behind another donkey
I'm behind that second donkey
But there is a whole nation behind me

It is a murder you can describe in a word.

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

You need to remove two matchsticks to make the below equation true. Can you do it ?

What am I?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

Can you find the least possible number such that

If the number is divided by 3, it gives the remainder of 1;
If the number is divided by 4, it gives the remainder of 2;
If the number is divided by 5, it gives the remainder of 3;
If the number is divided by 6, it gives the remainder of 4.

A red house is made out of red bricks. A yellow house is made out of yellow bricks. And, a blue house is made out of blue bricks. So, what is a greenhouse made of?

When it's bad luck to meet a black cat?

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?