### Boxed In

A box has faces with areas 3, 12 and 25 square centimetres. What is the volume of the box?

### Plutarch's Boxes

According to Plutarch, the Greeks found all the rectangles with integer sides, whose areas are equal to their perimeters. Can you find them? What rectangular boxes, with integer sides, have their surface areas equal to their volumes?

### The Genie in the Jar

This jar used to hold perfumed oil. It contained enough oil to fill granid silver bottles. Each bottle held enough to fill ozvik golden goblets and each goblet held enough to fill vaswik crystal spoons. Each day a spoonful was used to perfume the bath of a beautiful princess. For how many days did the whole jar last? The genie's master replied: Five hundred and ninety five days. What three numbers do the genie's words granid, ozvik and vaswik stand for?

# Cuboid Challenge

##### Stage: 3 Challenge Level:

From a square sheet of paper $20$ cm by $20$ cm, we can make a box without a lid.
We do this by cutting a square from each corner and folding up the flaps.

Will you get the same volume irrespective of the size of the squares that are cut out?
Investigate what volumes are possible for different sizes of cut-out squares.
What is the maximum possible volume and what size cut produces it?

Try different sized square sheets of paper.
Can you find a relationship between the size of paper and the size of cut that produces the maximum volume?