How can one talk without saying a single word?

John is the son of Jacob.
So,
Jacob is the_____of John's father?

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

What is the next number in this matchsticks series riddle?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

Identify the hidden meaning behind this picture?

There is a barrel with no lid and some wine in it. 'This barrel of wine is more than half full,' said Curly. 'No it's not,' says Mo. 'It's less than half full.' Without any measuring implements and without removing any wine from the barrel, how can they easily determine who is correct?

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

Can you find the hidden animal in the picture below?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?