Can you replace the question mark with the correct number?

John speaks the truth only once a day in a week. Below are a few hints for you:

First: Days are Sunday, Monday and so on.
Second: One day he says, "I lie on Monday and Tuesday".
Third: On the next day, he says, "Today is either Thursday, Saturday or Sunday".
Fourth: On the next day, he says, "I lie on Wednesday and Friday".

Can you identify the day on which he speaks the truth?

A cat had three kittens: Snophy, Topsy and Jorden. What was the mother's name?

Can you find out the total number of triangles in the given figure?

Eight Chelsea player makes the following statements :

1. Seven of us are lying here.
2. Six of us are lying here.
3. Five of us are lying here.
4. Five of us are lying here.
5. Four of us are lying here.
6. Three of us are lying here.
7. My name is Torres.
8. My name is Lampard.

The last two are Lampard and Torres or maybe Torres and Lampard.
So can you deduce which of the last two is Lampard or Torres?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

A mathematician couple was having a Frappuccino in Starbucks sitting opposite to each other. Suddenly the guy noticed the text written on the paper in front of them and exclaimed that it was wrong. The girl denied it and said it is appropriate. Both are correct. What is written on the paper?

I have a big mouth and I am also quite loud! I am NOT a gossip but I do get involved with everyone's dirty business.

what's the probability of getting a king or a queen from a pack of 52 cards?

Why did Navjot Singh Sidhu put the new January calendar in the freezer