Can you replace the question mark with the correct number?

Which part of London exists in France as well ?

An infinite number of mathematicians are standing behind a bar. The first asks the barman for half a pint of beer, the second for a quarter pint, the third an eighth, and so on. How many pints of beer will the barman need to fulfill all mathematicians' wishes?

What's the next in the series?

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

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

Andrew’s doctor gives him three pills and tells him to take one every half hour. How much time will have passed by the time Andrew’s taken all three pills?

Give it food and it will live; give it water and it will die.

Why is 6 afraid of 7?