By David Shaw, 7 February 2019
Maryam had been practising the times tables really hard, so she was on the alert for interesting patterns. On her dad’s birthday she noticed something special. “You’re four times older than me, Dad,” she exclaimed.
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By David Shaw, 25 July 2018
Twenty years ago, my mum was twice my age. I’m 42 years old. How old is my mum?
