What famous saying does this rebus mean?

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

Can you place six X (crosses) in below board without making three in a row in any way ?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

Solve The below Equation:

ALFA + BETA + GAMA = DELTA

How can you take 2 from 5 and leave 4?

At a Society election for president, precisely 963 votes were cast.
There is a total of 4 candidates that participate in the election.

The winning candidate exceeds the opponents by 53, 79 and 105 votes.

How many votes do each candidate gets?

How many times can you subtract the number 5 from 25?

Three ants are going up a hill, one behind the other. The last ant then says to the other ants, 'There is an ant behind me!'' How come?

With the help clues provided in the image, can you find the 5 digit key?

Suppose you are sitting in an interview and the interviewee asks you an aptitude question.

You have three buckets with a capacity of 4 litres, 8 litres and 10 litres and you have a large tank of water. Now you have to measure 3 litres of water precisely using those buckets. How will you do it?