2, 3, 5, 9, 17, _ What is the next number in the sequence?

Below, you can see three complete equations and one incomplete. Based on the three complete ones, can you complete the incomplete one?

5 $ 4 $ 3 $ 9 = 4215
6 $ 9 $ 2 $ 6 = 3816
4 $ 7 $ 3 $ 3 = 1122
7 $ 2 $ 7 $ 4 = ____

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

I am not a bull but I have horns.
I am not an ass but I have a pack saddle.
Wherever I go, I leave silver behind me.

Who am I?

Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

I am sure no one can have two things for dinner. what are they?

You are provided with a grid (as shown in the picture). Can you fill the squares with numbers 1-8 in a manner that none of the two consecutive numbers are placed next to each other in any direction (vertically, horizontally or diagonally?)

What number comes next in the series?

5 15 5 18 5 24 14 20 _

A man is found unconscious in front of a store at two in the morning. His head is bleeding and there’s a brick laying next to him. When the police arrive, they carry the man to jail. Why did they arrest him?