What's the next in the series?

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

Christina is practising her dance steps along with her friends. In a particular sequence, all of them form a row. At that point, Niharika is standing in the 4th position from either end of the row.
Can you find out how many girls are practising together?

A mother bought three dress for her triplets daughters(one for each) and put the dresses in the dark. One by one the girls come and pick a dress.
What is the probability that no girl will choose her own dress?

Remove two matchsticks to make the below equation correct.

What 5-letter word typed in all capital letters can be read the same upside down?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

Can you name some countries which do not have the alphabet 'A' in them?

There is a circular car race track of 10km. There are two cars, Car A and Car B. And they are at the exact opposite end to each other. At Time T(0), Both cars move toward each other at a constant speed of 100 m/seconds. As we know both cars are at the same speed they will always be the exact opposite to each other.
Note, at the center, there is a bug which starts flying towards Car A at time T(0). When the bug reaches car B, it turns back and starts moving towards the car A. The speed of bug is 1m/second. After 5 hours all three stop moving.
What is the total distance covered by the bug?

Which city is three-fifths chick two third cat and 50% goat?

Why did Navjot Singh Sidhu put the new January calendar in the freezer