You need to arrange three 7 and mathematical symbols to form number 1?

I have Rs.50 and I spend it in the way as below.

There are 3 apples in the basket and you take away 2. How many apples do you have now?

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

The peacock is a bird that does not lay eggs. How do they get baby peacocks?

You measure my life in hours
I serve you by expiring
I vanish faster when I am thin
and slower when I am thick
The wind is my energy
What am I?

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

f you were running a race, and you passed the person in 2nd place, what place would you be in now?

In Greek mythology, the Sphinx sat outside of Thebes and asked this riddle of all travellers who passed by. If the traveller failed to solve the riddle, then the Sphinx killed him/her. And if the traveller answered the riddle correctly, then the Sphinx would destroy herself. The riddle:

What goes on four legs in the morning, on two legs at noon, and on three legs in the evening?

Oedipus solved the riddle, and the Sphinx destroyed herself.

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.