Decode this picture on T-Shirt and tell what it says ?

In the picture given below, can you find out which digit will take place of the question mark?

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

All of you like to eat me. I am a five-lettered word. Remove the first two and I turn into an infamous animal. Remove just the first and I become a heinous crime. Remove the first and the last and you can groove on me.

Can you guess who am I?

It's a test that will check your IQ.

Suppose you have one 11 minute hourglass and one 13 minute hourglass.

Can you measure exactly fifteen minutes using them ?

Nodes are shown below and you need to connect them based on the following rule: Every node can be connected to the number of nodes inside them, i.e. the first node there is a value of 1 which indicates that the first node can connect to exactly one node only.Can you do it?

What is the riddle which can be asked all day with a different correct answer each time.

Prove that twice of ten is the same as twice of eleven.

I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?