The Two Hourglasses

You have only two hourglasses. The first one times exactly 7 minutes, the other times exactly 11 minutes.

Using just these two hourglasses and nothing else, how would you accurately time 15 minutes?

Ah! Click here to read the solution.

A bit tricky this one, the solution is to:

1. Start both hourglasses at the same time.
2. At the end of 7 minutes, quickly flip over the 7-minute hourglass.
3. In another 4 minutes, the 11-minute hourglass will be empty and 4 minutes will have elapsed from the 7-minute-hourglass. Thus, once the 11-minute hourglass has been empty, quickly flip the 7-minute hourglass over and watch the remaining 4 minutes fall down.

This gives: 7 minutes + 4 minutes + 4 minutes = 15 minutes. 🙂

The Greatest Pharaoh

The Pharaoh asked: “Who is the greatest of the gods of all time?”

Horus said: “I am not”.
Isis said: “Anubis is”.
Anubis said: “Isis is lying”.

Only one god is telling the truth, the other two are lying.

Who is the greatest?

Ah! Click here to read the solution.

If we assume Horus is the greatest god, this gives:

“I am not” said Horus (lie)
“Anubis is” said Isis (lie)
“Isis is lying” said Anubis (truth)

Thus, the answer: ‘Horus is the greatest god’. Easy one 🙂