Ten stars have fallen and are hiding in the grid below. You must find the locations of these stars. A number tells you how many stars are located next to that cell, either horizontally or diagonally. No square with a number in it also contains a star, but a star may appear in a square with no adjacent numbers. Can you find all ten stars?

Here’s a starting hint, if you need it.

For easier solving, you can download this puzzle here.

Answer

What number should replace the question marks?

GOLD = 5

LEAD = 6

SILVER = 8

URANIUM = 11

PLATINUM = ??

Answer

I’m going to give you eight one-pound weights, each about the size of a baseball. I’ll also give you a simple balance — the kind where you place objects in two different trays, in order to find out if one weighs more than the other.

One of the weights, while identical to the others, is actually lighter than a pound. Your task is to figure out which of the eight weights is the light one. You may use the balance… but you can only use it twice. How can you figure out which weight is the light weight?

Answer