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#45 Square differences
Set by Alison Kiddle
The number 9 can be written as a difference of two squares as 32 – 02 = 9 – 0 = 9. Can you find a different way to express it as the difference of two squares?
Which numbers between 1 and 30 can be written as a difference of two squares?
Some numbers cannot be written in this way – can you determine which ones?
Solution next week
#44 Dice and cards
Solution
The average for three dice is 10.5. The sum of the values on one die is 21, which is divided by 6…
