Fiona finds one shell at the beach if she finds twice as many shells as the day before how many does she find in seven days

Question

Fiona finds one shell at the beach on her first day, each day she finds twice as many as the day before, how many does she find in seven days

 

Answer 1

This is an exponential problem, involving doubling, and is fairly simple to solve: Simply start with one (1), and double it. Now you have two (2), double the number of shells Fiona found on the first day. For day three (3), you would double two (2), and so forth.

 

Day 1: 1 shell

 

Day 2: 2 shells

 

Day 3: 4 shells

 

Day 4: 8 shells

 

Day 5: 16 shells

 

Day 6: 32 shells

 

Day 7: 64 shells