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Blog posts of '2019' 'August'

2019 NSW: Maths Puzzle 6

6th puzzle by Dr Harry Wiggins (Reverse fun)

Did you know 2178 x 4 = 8712?

Find all ten-digit numbers which becomes 9 times bigger if the order of the digits is reversed.

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2019 NSW: Maths Puzzle 5

5th puzzle by Dr Harry Wiggins (All in the family)

Nxolo has four children with different ages.  The two daughters are Cindy and Letshego and the two sons have names Thabo and Zuma. Once, at a dinner table, the following conversation happened:

Cindy: The sum of my oldest brother and mom is 53.

Le...

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2019 NSW: Maths Puzzle 4

4th puzzle by Dr Harry Wiggins (Money, money, money)

Two choices today. Solve either puzzle (a) or (b) and post your interesting comments.

(a) If in South Africa, you only get two types of coins: R19 and R20 coins. What is the least number of coins you need to pay a bill of R2019? 

(b) A billiona...

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