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

What seven-letter word has hundreds of letters in it?

You throw me out when you want to use me and you take me in when you don't want to use me.

Who Am I?

In a family supper, a grandfather, a grandmother, two fathers, two mothers, four children, three grandchildren, one brother, two sisters, two sons, two daughters, one daughter-in-law, and one mother-in-law need to sit at a table.

There are only seven chairs available at the place. How many more chairs do they have to borrow so that everyone can sit down together for the suppers if everybody requires a separate chair?

Jim has three close friends at his school: Michael, John and Alice. Two of them play football, two play basketball and two play hockey. The friend who does not play hockey does not play basketball as well. The friend who does not play football does not play hockey.

Can you identify which sport/s is played by which person?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

What word is pronounced the same if you take away four of its five letters?

What's the next in the series?

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

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

John has played 50 ODI's and his average is 50. How many runs should he score in his 51st ODI, so that his average score jumps to 51?