2 x 32 sq = ?

Question

There are 8 nails to a horse shoe. There are 32 nails for all for shoes. If the first nail costs $.01 and is doubled for each succeeding nail (example: 1st = .01, 2nd, = .02, 3rd = .06, and 4th = .12) what is the cost for all 32 nails?

Answer 1

If the 2nd nail costs 0.02 and each succeeding nail is doubled (which means multiplied by 2) then the 3rd nail will cost 0.04 and the 4th nail will cost 0.08. 

 

This problem is simply asking you to continue this doubling process to get the cost of each of the 32 nails and then add up the cost for all of them.