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

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

I am an odd number. Take away a letter and I become even. What number am I?

If a shopkeeper can only place the weights on one side of the common balance. For example, if he has weights 1 and 3 then he can measure 1, 3 and 4 only. Now the question is how many minimum weights and names of the weights you will need to measure all weights from 1 to 1000? This is a fairly simple problem and very easy to prove also.

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

I have 50 feet long of cloth, I need to create 50 handkerchiefs each size of 1 foot. I take one minute to cut a 1-foot handkerchief. So how long will it take to cut 50 handkerchiefs?

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

Pronounced as one letter,
And written with three,
Two letters there are,
And two only in me.
I am double, I am single,
I am black blue and grey,
I am read from both ends,
And the same either way.