A geologist has collected 63 samples and needs at least 67. How many additional samples are required?

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Multiple Choice

A geologist has collected 63 samples and needs at least 67. How many additional samples are required?

Explanation:
To meet a minimum total, you look at the difference between what you want and what you have. You need at least 67 samples, and you already have 63. The extra needed is 67 minus 63, which equals 4. So you must collect four more samples to reach the threshold exactly. If you added three, you’d still be short; adding five would work but isn’t the smallest amount required.

To meet a minimum total, you look at the difference between what you want and what you have. You need at least 67 samples, and you already have 63. The extra needed is 67 minus 63, which equals 4. So you must collect four more samples to reach the threshold exactly. If you added three, you’d still be short; adding five would work but isn’t the smallest amount required.

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