What work can one never finish?

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?

What is the word or phrase?

There are hundred red gems and hundred blue gems. The blue gems are priceless while the red gems equal wastage. You have two sacks one labeled Heads and the other Tails. You have to distribute the gems as you want in the two sacks. Then a coin will be flipped and you will be asked to pick up a gem randomly from the corresponding sacks.

How will you distribute the gems between the sacks so that the odds of picking a Blue gem are maximum?

What kind of band never plays music?

If,

A + B = C
D - C = A
E - B = C

Based on the above equations, find out the answer for:

D + F = ?

How can you spell "White of an egg" in one word?
Hint: I know you can spell coke, poke, and joke.

In front of you, there are 9 coins. They all look absolutely identical, but one of the coins is fake. However, you know that the fake coin is lighter than the rest, and in front of you is a balance scale. What is the least number of weightings you can use to find the counterfeit coin?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

What begins with T, ends with T, and has T in it?