What's the next in the series?

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

There are nine dots in the picture that has been attached with this question. Can you join all the dots by drawing four straight lines without picking up your pen?

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

If,
9 * 8 * 7 = 65
8 * 7 * 6 = 50
7 * 6 * 5 = 37

Find
6 * 5 * 4 = ?

A father's child, a mother's child, yet no one's son.

Who am I?

It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

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

Which flower has two lips?

How do you go from 98 to 720 using just one letter?

A man always keeps a spare tyre in his car. To make full use of all the five tyres, he changes the tyres in a manner that for a distance of 1, 00,000 km, each of them runs the same distance.

Can you calculate the distance travelled by each tyre on that journey?