by David, 12 August 2022 | 3 comments

This quiz is for all you maths wizards. Can you maximise your score, or does this quiz have your number?

Continue reading Your number is up! A quick quizby David, 13 November 2019 | 0 comments

Difficulty: Fun Sienna’s teacher is writing up a wicked problem on the board. First, the teacher writes all the numbers from 1 to 99. Then they erase 10, 20, and all the other numbers that end in 0. “Listen up!” the teacher announces. “I want you to multiply all the numbers on the board.

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by David, 20 February 2019 | 2 comments

Which two whole numbers – without any zeros – multiply together to make 1 000 000?

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by David, 18 June 2013 | 0 comments

How did people multiply before calculators were invented? You could try doing it in your head, but you could also use a mechanical calculator, such as this set of Napier’s bones.

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