If you receive 2 items every week, to find out how many weeks it will take to accumulate 100 items, you can use the following calculation:
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First, divide the total number of items you want (100) by the number of items you receive each week (2):
\[ \text{Weeks} = \frac{100}{2} = 50 \]
So, it will take 50 weeks to get 100 items.