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

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

What goes up but never comes down?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

What do you think with the below Picture ?

I have two coins.
* One of the coins is a faulty coin having a tail on both sides of it.
* The other coin is a perfect coin (heads on side and tail on other).

I blindfold myself and pick a coin and put the coin on the table. The face of the coin towards the sky is the tail.

What is the probability that another side is also tail?

What common phrase is represented by the below lines

Easy going:
Weak, 'I'm going.'
Tough, 'I'm staying.'

Medium going:
Weak, 'I'm going.'
Tough, 'I'm staying.'

Tough going:
Weak, 'I can't do it, I'm staying!'
Tough, 'Let's get going.'

I am an odd number. Take away a letter and I become even. What number am I?

What jumps when it walks and sits when it stands?

I am Huge on Sunday and Saturday.
I am small from Tuesday to Thursday.
I do not exist on Monday and Friday.
Who am I?