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Mathematics, 18.04.2020 01:25 bnbjj

Roberto began his collection of trading cards when his grandfather presented him with a set of 18 cards. Each week, he added 5 cards to his collection. His collection grew by the sequence shown below.
18, 23, 28, 33, ..
How many cards did he have at the end of the 10th week?

A. 68
B. 58
C.72
D. 63

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