At a bug museum exhibit, there are 20 creatures on display, a mix of spiders and beetles. Spiders have 8 legs and beetles have 6 legs. Altogether the creatures have 138 legs. How many spiders are 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.