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A number is a multiple of 42 if it's a multiple of 2 and 21 at the same time
126 is a multiple of 42 because it ends in 6, which means it's a multiple of 2, and 12 - 6 x 2 = 0, which means it's a multiple of 21
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Earn +20 ptsQ: What are the divisibility rules of 42?
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What are the 2-10 divisibility rules?
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Who invented divisibility rules?
Divisibility rules have been developed and refined by mathematicians over the centuries. It is difficult to attribute the invention of divisibility rules to a specific individual. However, some early rules can be traced back to ancient civilizations like the Egyptians, Babylonians, and Greeks. These rules were further expanded upon and formalized by various mathematicians throughout history.
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bogo mo!
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