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Who can do math problems fastest?
Lili: 65438+4/05 hours = 4 ÷ 15 ≈ 0.267 hours.

Red: 1 1.2 hours = 2 ÷1≈ 0.182 hours.

Mingming: 65438+3/3 hours = 3 ÷ 13 ≈ 0.25438+0 hours.

For the same amount of homework, the more time you spend, the slower you do it; On the contrary, the less time you spend, the faster you do it.

Of the three people, red has the least time and Lili has the most time.

So: Red is the fastest and Lily is the slowest.