What famous saying does this rebus mean?

COME SERVED <---
COME SERVED
COME SERVED
COME SERVED
COME SERVED

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

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

There are three light switches outside a room. One of the switches is connected to a light bulb inside the room.
Each of the three switches can be either 'ON' or 'OFF'.

You are allowed to set each switch the way you want it and then enter the room(note: you can enter the room only once)

Your task is to then determine which switch controls the bulb?

There was a strange boy who was born before his father. How can this be possible?

Rose, Lily and Jasmine decided to buy flowers for their moms on Mother's Day. One of them bought lilies, the other roses, and the third one jasmines.
'It's funny!' said the girl with roses, 'we bought roses, jasmines and lilies, but none of us bought the flowers matching her name'.
'You're right!', said Lily.
What kind of flowers did each of the girls buy?

Replace the question mark with the correct number in below Picture:

What is the difference between a jeweller and a jailer?

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?