The power of Estimation


1. Imagine a piece of rope tied around the Earth, about 40,000 kilometres long.

Now imagine another piece of rope tied around the Earth, but 1 metre above the ground.

Don't do a calculation. Just quickly estimate how much more rope is needed?

Which one would be the nearest extra rope required?

  10000km  1000km  100km  1km  100m  10m

2. Estimate the following question within 5 seconds:

"Given a piece of paper 0.1mm thick, estimate how thick the paper would be if it were folded on itself 100 times?"

Support MME

Your donations help pay for expensive webspace and bandwidth. Please give to keep MathsMadeEasy running.