Daily Archives: April 13, 2018

DAY 104:

Today’s Challenge Here’s a selection of mental arithmetic questions.  Can you get all seven correct?  (10 + 10) – (15 – 3) = ?  What is the sum of 0.83 and 0.89?  What is 1 × 9?  If Ben earns £10 every half-hour, how … Continue reading

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