PRINCIPAL'S WEEKLY CHALLENGE
Principal's Weekly Challenge No.7

Assume you are using a basic calculator and press the numbers in the order shown, replacing each question mark with a mathematical sign.

Plus, minus, multiply and divide can each be used once only.

In which order should they be used to score 24?

2    ?     8    ?     6    ?     9    ?    3   =    24

Answer to Principal's Weekly Challenge No.6

Chessboard
A knight is positioned on the centre square of this chessboard.

Move the knight to each square once only, collecting letters to spell out five types of dwelling.

Each dwelling is five letters long.

What are they?

ANSWER: house, lodge, manor, igloo and villa
Shopping trolley

Answer to Principal's Weekly Challenge No.5

In a supermarket, the first 25 customers of the day purchased an average of two items each.

After a further 15 customers, the average number of items purchased by each customer rose to eight.

What was the average number of items purchased by the last 15 customers only?

ANSWER: 18