I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

I am a five-letter word and comprises two different vowels and three same consonants. I am so strong that I can spoil your entire work.

Can you find out who am I?

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

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

A wooden log balances equally on the scales when weighed with three-quarters of a pound and three-quarters of a wooden log.

Can you calculate the weight of the entire wooden log?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

What has many keys but can’t open a single lock?

If six children and two dogs were under an umbrella, how come none of them got wet?