Why is Saturday stronger than Monday?

Can you count the number of quadrilaterals in the picture below?

You are given four tennis balls and asked to arrange those balls in a manner that the distance between each one of them is exactly equal. How will you do it?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

I have eight fingers and two thumbs but I do not live. What Am I?

Can you count the number of triangles inside a triangle?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

What type of tree can I carry in my hand?

I cry without having a voice.
I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?

What kind of band never plays music?