It looks like a simple math sum but has left people scratching their heads... can you solve it?

It looks simple at first, but this math problem has the internet stumped. Don't be fooled - it demands more brainpower than ...
Edutopia

A 5-Stage Strategy Students Can Use to Tackle Word Problems

Stage 5: Justify thinking. A vital habit that many students need to solidify is recontextualizing after they solve ...