Printed from https://www.nctm.org/pows/ | Copyright: National Council of Teachers of Mathematics | PoW ID: 1549

Pushing Pennies

On a square of paper measuring 38.1 mm. a side, you can fit exactly four pennies. Hmmm.... I wonder how many you could fit on a standard sheet of notebook paper (8.5 in. by 11 in., or 215.9 mm. by 279.4 mm.).

Pick a method and estimate the number of pennies you could fit, then tell why you think your estimate is high or low. Be sure to show all your work.

 Four pennies in a 2x2 arrangement