At the void deck one evening there were 30% more grandmothers than grandfathers and 40% more grandsons than granddaughters. There were as many males as females. Altogether 656 people were at the void deck. How many grandsons were there?
Opening the drawing…
MathBrush is being tested with a few parent groups, and every solution on the site is open to them. If you were given a code, it goes in once and this device remembers it. 65 worked examples are free to everyone without one.