Remove two matchsticks to make the below equation correct.

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

What is next number in the pattern below:

131 517 192 123 ?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

What has a bottom at the top?

O_er_t_o_

Complete the missing letters of the given word.

Why do people go to bed?

If an electric train is travelling south, then which way is the smoke going?

Can you name four days which start with the letter 'T'?

A sundial has the fewest moving parts of any timepiece. Which has the most?