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Basic Mathematics Warmups

These problems and puzzles will put your deductive reasoning ability to the test and reinforce your mathematical skills. See more

Mental Shortcuts - Basic

         

Which of the following is equivalent to calculating 20% of 36?

Instead of multiplying by 5, it might be easier to multiply by 10.

Which of these is an easier version of \( 72 \times 5 \)?

Which of these gives a nice shortcut to compute \( 34 \times 11 \) in your head?

Which of these is equivalent to \( 8888 \times 5 ?\)

When calculating \( 100-36 \) by hand, we have to do a lot of "borrowing". It would be much easier to subtract from 99 instead. Which of the following is equivalent to \( 100-36 \)?

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