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

Which digit occurred maximum times between the number 1 and 1000?

Below is the sum of symbols in each row and column in the figure. Analyzing the figure, can you find out the value of the symbols?

Find out the missing number in the picture attached:

What does the below rebus riddle means?

What animal walks on four legs in the morning, two legs during the day, and three legs in the evening?

Oedipus, the king of Thebes, figured out the answer to the riddle:

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

I want to fill my bucket using both cold and hot water.
I have two taps for both cold and hot water. The hot water tap fills the bucket in exact 6 hours and the cold water tap fills the bucket in exact 4 hours.
I turn both of them simultaneously but I forgot to turn off another tap which removes the water out of the bucket. This tap can empty the bucket in 12 hours.

How Long will it take to fill the bucket?

Find the hidden panda in the image below.

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?