What is the word or phrase?

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

What work can one never finish?

A man calls his dog from the opposite side of a river. The dog crosses the river without a bridge or a boat and manages to not get wet. How is this possible?

John has played 50 ODI's and his average is 50. How many runs should he score in his 51st ODI, so that his average score jumps to 51?

Which point will the car reach to go out?

Why do we preferably have round manhole covers and not square ones?

Rose, Lily and Jasmine decided to buy flowers for their moms on Mother's Day. One of them bought lilies, the other roses, and the third one jasmines.
'It's funny!' said the girl with roses, 'we bought roses, jasmines and lilies, but none of us bought the flowers matching her name'.
'You're right!', said Lily.
What kind of flowers did each of the girls buy?

I shave every day, but my beard stays the same. What am I?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?