Matter is anything that takes up space, which means it has mass, and has weight. Matter can be a solid, liquid, or gas. All matter does not have the same properties or characteristics. The properties of matter may include odor, texture, size, color, shape, temperature, volume, mass, and density.
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The correct answer is
The smallest number is the one that comes first while counting.
To arrange the given numbers in order from smallest to greatest, find the smallest number among all the given numbers.
21 is the smallest number.