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?
Step-by-step reasoning process below:
40
Today, Vincent bought 15 + 10 = 25 packs of stickers.

Therefore, Vincent has 15 + 25 = 40 packs of stickers.

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So, the answer is 40