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

Spot 5 differences in two Christmas tree below:

Three ants are going up a hill, one behind the other. The last ant then says to the other ants, 'There is an ant behind me!'' How come?

Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

Name the three-letter word that can complete the below words?

A) L O _ _ _ E
B) E D U _ _ _ E
C) _ _ _ E R
D) _ _ _ T L E

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

What does the below image rebus riddle means ?

Joseph buys three kinds of chocolates for 100 rupees. The first one is priced at 5 rupees, second one at 3 rupees and third one at 0.5 rupees.

If he bought 100 chocolates in total, how many pieces do you think he bought each chocolate?

If Rajina's daughter is my daughter's mom, who am I to Rajina?

Why is the Hole below a Lock?