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

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

During which month do people sleep the least?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

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

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

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

1 rabbit saw 9 elephants while going to the river. Every elephant saw 3 monkeys going toward the river. Each monkey had 1 parrot in each hand. How many animals are going towards the river?

What is more useful when it is broken?

A man started to town with a fox, a goose, and a sack of corn. He came to a stream which he had to cross in a tiny boat. He could only take one across at a time. He could not leave the fox alone with the goose or the goose alone with the corn. How did he get them all safely over the stream?