When we see 2 but call 10?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

10+10 and 11+11 can give you the same answer.

Explain how?

Can you start the fire using two pieces of wood?

Forwards I am heavy, backward I am not. What am I?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

I am working in a bus company. The company recently went under expansion and therefore there was not enough room for all the buses. As a result, twelve buses had to be stored outside.

If the company decides to expand the garage space by forty percent, enough space to accommodate the current buses will be created leaving enough space for twelve more buses if the need arises in future.

Can you calculate the number of buses that the company owns at present?

what does the below rebus means?

How many sides does a circle have?

Why is the Hole below a Lock?