Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

What is the fastest way to double your money?

I cry without having a voice.
I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?

What kind of tree can you carry in your hand?

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

Can you find the ages of a son, father and grandfather based on the following facts?
The sum of the ages of grandfather, father and son is 140 years.
The age of the son in months is the same as the grandfather in years.
The age of the son in days is the same as the father in weeks.

While going to your grandmother's house, you counted Twenty houses on the right side. While returning back to your home, you counted Twenty houses on the left side.

How many houses are there between your home and your grandmother's home?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?