Question

You are Miguel Cervantes de Navas y Colon, captain in the Royal Spanish Army in Sevilla in the year 1842. Outside your barracks window there is a stack of cannonballs, as shown in the illustration. On an idle afternoon you decide to calculate how many cannonballs are in the stack. What is the number of cannonballs?

Answer 1

.....

Answer 2

HELP ME. I'M flutterING RETARDED.

Answer 3

top row = 1 = 1^2
2nd row = 4 = 2^2
3rd row = 9 = 3^2
...are u sensing a pattern here?
how many rows are there...?

Answer 4

yes and twelve rows

Answer 5

so the sum would be 1^2 + 2^2 + 3^2 + 4^2...etc to 12^2

and easier way to write this is
n(n+1)(2n+1)/6
so as u have 12 rows, n=12
sub and solve away dude

Answer 6

I'm a chick but thanks ^_^

Answer 7

i call everyone dude...dude
sorry

Answer 8

its chill

Answer 9

prefer dudette...?

Answer 10

;P

Answer 11

yes :D

Answer 12

so how many cannonballs all up?

Answer 13

650

Answer 14

spot on dudette!
slaters ;P

Answer 15

later "dude"! :D