Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

I am first found in caves, now prolific online; I am a depiction, a drawing, a symbol, or sign. I will convey whichever mood you could wish; or for that matter, a fist, flask, or fish. What am I?

What famous saying does this rebus mean?

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

John and Jenni are a married couple. They have two kids, one of them is a girl. Assume safely that the probability of each gender is 1/2.
What is the probability that the other kid is also a girl?

Hint: It is not 1/2 as you would first think.

John and Jacob are twin brothers. One of them is a liar whereas the other one is a truth-teller.

I called their home number and one of them picked up.
I asked. 'Does John lie?' The person replied with a yes.

Whom did I talk with, John or Jacob?

I am lying and I always lie. Tell me whether I am lying or telling the truth.

Replace the question mark with the correct number in the below-given picture?

Identify the hidden meaning behind this picture?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?