If a person puts one penny in a piggy bank on the first day, two pennies in on the second day, three pennies in on the third day, and so forth, how much money will be in the bank after 60 days?
A) $9.15
B) $18.30
C) $0.60
D) $36.60

Question

Quizplus · Accepted Answer

The total number of pennies after 60 days is the sum of the first 60 natural numbers, which is given by the formula n(n+1)/2. For n = 60, this is 60(61)/2 = 1830 pennies, which is $18.30.

If a Person Puts One Penny in a Piggy Bank