Bruno wants to buy two and one-half dozens of pens. How many pens will he have?
Think hard. Detailed solution:
30
Since a dozen is equal to 12, then two dozens are equal to 12 x 2 = 24.

One - half dozen is equal to 12 / 2 = 6.

Thus, Bruno will have a total of 24 + 6 = 30 pens.

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The answer is 30