What has a ring but no finger?

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

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

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

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?

What's the next in the series?

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

What has 88 keys?

Which alphabet letter is a question?

Three ants are sitting at the three corners of an equilateral triangle. Each ant starts randomly picks a direction and starts to move along the edge of the triangle. What is the probability that none of the ants collide?