How is the moon similar to a dollar?

Which tank will fill first?

I have branches, but no fruit, trunk or leaves. What am I?

What is so fragile that saying its name breaks it?

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.

What is greater than gold but cannot be bought. it can never be sold and can earn if its sought. though it can be broken, it can still be fixed. for by birth it can't start nor by death it is ended.what am i?

The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

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

What is the riddle which can be asked all day with a different correct answer each time.

Which English verb becomes past tense just by rearranging the letters?