Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

Find the next number in the series below

21 32 54 87 131 ?

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

How many minutes are there in Feb 2017?

Note: The shortest answer is the correct answer.

Mr Black, Mr Gray, and Mr White are fighting in a truel. They each get a gun and take turns shooting at each other until only one person is left. Mr Black, who hits his shot 1/3 of the time, gets to shoot first. Mr Gray, who hits his shot 2/3 of the time, gets to shoot next, assuming he is still alive. Mr White, who hits his shot all the time, shoots next, assuming he is also alive. The cycle repeats. If you are Mr Black, where should you shoot first for the highest chance of survival?

What breaks yet never falls, and what falls yet never breaks?

What does this rebus means ?

The first person saw the bridge step on it and crossed,
the second person saw the bridge did not step on it but crossed,
the third person did not see the bridge did not step on it but crossed.
Who are these people?

In the Mexico City area, there are two Houses H1 and H2. Both H1 and H2 have two children each.
In House H1, The boy plays for Mexico Youth academy and the other child plays baseball.
In House H2, The boy Plays soccer for his school in Mexico and they recently have a newborn.

Can you prove that the probability of House-H1 having a girl child is more than that of House-H2?

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