We know that the number 7 is the prime followed by a cube. Which next number is also a prime followed by a cube?

In four steps you need to move the word 'cold' From 'warm' by replacing one alphabet at a time such that every word formed at each step is acceptable in English Dictionary.

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

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

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

The more you take me, the more you leave me behind.
Who Am I?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

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

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?