Blog Archives

Quirky Birthday Maths for 2012

My sister, closest in age to me, is now four times older than my eldest daughter.

In twenty years time, the age difference will have halved and my sister will only be twice as old as my eldest daughter. It’s made me wonder what the minimum age multiple would be between them.

Go figure…

Long Multiplication #Method 1

There may be 15 more of these to go…

This is a popular one with some of my learners at the moment.

Variously described as the Lattice/Matrix/Medieval Method.