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Which story problem can be represented by this number sentence?
3 × 29 =
A library has 3 more science books than mystery books. There are 29 science books. How many mystery books does the library have?
A library bought 3 new mystery books. It already had 29 mystery books before it bought the new books. How many mystery books does the library have now?
There are 3 carts filled with library books. Each cart has 29 books. How many library books are on the carts?
The library checked out 3 fewer books this week than last week. There were 29 books checked out this week. How many books did the library check out last week?