Someone asks whether 84 is in the count-by-6s list: 6, 12, 18, 24 and so on
Someone asks whether 84 is in the count-by-6s list: 6, 12, 18, 24 and so on. Naveen says yes, because 84 is an even number and 6 is also even. Ira says being even is not enough by itself — you have to actually check if it divides evenly. Who is right, and is Naveen's reason solid?
Who do you think is right? Pick one.
The answer: Ira is right, check the division
Why
Here's the twist worth noticing first — 84 really IS in the count-by-6s list: 84 ÷ 6 = 14 exactly, no remainder. So Naveen's answer is correct. But his REASON is not, and that matters just as much. "Both numbers are even" cannot be the rule, because plenty of even numbers are not multiples of 6 — 4, 8, 10, and 14 are all even, yet none of them divides evenly by 6. Evenness only guarantees a number splits into groups of 2; being a multiple of 6 needs it to split cleanly into groups of 6, which is a stricter, different test. The only way to actually know is to divide: 84 ÷ 6 = 14 works out exactly, so 84 passes; 82 ÷ 6 = 13 remainder 4, so 82 (also even) fails. A right answer built on a rule that breaks on other numbers is still a right answer today and a wrong one tomorrow — check the actual division, not a shortcut that only sometimes matches it.
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