What Time Should the last watch show in the below figure?

What's the next in the series?

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

What is the centre of gravity?

The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

People put me on the table and cut me but do not eat me. What am I?

On rolling two dices (six-sided normal dice) together, what is the probability that the first one comes up with a 2 and the second one comes up with a 5?

An octopus has 8 legs. A hippogriff has 6 legs and 2 pairs of wings. A sphinx has 6 legs and one pair of wings. Now we have all 3 kinds and a total of 18 insects in a cage. We have a total of 118 legs and 20 pairs of wings. How many insects do we have of each kind?

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?