Yesterday, Vincent bought fifteen packs of stickers. Today, he bought ten more packs of stickers than yesterday. How many packs of stickers does Vincent have altogether? Let's think first. Chain of thought:
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Today, Vincent bought 15 + 10 = 25 packs of stickers. Therefore, Vincent has 15 + 25 = 40 packs of stickers.
Therefore, the answer is 40.
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