Question

Each level of a smartphone app adds more gems for you to match. On level one, there were 13 gems. On level twelve, there were 123 gems. When you complete all twelve levels, how many total gems will you have matched?

Answer 1

605

660

748

816

Answer 2

@campbell_st

Answer 3

there's a 110 difference between 13 and 123

Answer 4

@razor99

Answer 5

@waterpologoalie

Answer 6

@Loser66

Answer 7

this appears to be an arithmetic series question, and you are asked to find the sum of the series

\[S_{n} = \frac{n}{2}[ a + l]\]

n = number of levels, a = number of gems in the 1st level and l = number of gems in the last level.

substitute them to find the sum, or total number in the game.

Answer 8

816?

Answer 9

well is that a guess or a solution...?

Answer 10

both.
it's 816

Answer 11

well there you go... a little math got the answer.