How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

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.'

The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?

What 8 letter word can have a letter taken away and it still makes a word. Take another letter away and it still makes a word. Keep on doing that until you have one letter left. What is the word?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

There is something which you can be arrested for attempting but not for successfully completing.

What came first, the chicken or the egg?

What question can you never answer yes to?

How can one talk without saying a single word?