Its something that each of us devours,
Not just us but birds, beats, trees, and flowers,
Frets iron and nibbles steel,
Toil hard stones to meal,
Exterminates king, collapse town,
And blows the mountains down.

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?

It spends most of its day eating white, but when it’s quick enough, it gets to eat fruit and sometimes some blue things. It’s in a dark room, where the walls are blue, it runs from a ghost that roams the halls and haunts it all the time. What is it?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

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

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

How many times can you subtract the number 5 from 25?