To determine if a two-digit number is divisible by 8, you can use the divisibility rule derived from the given reference, although it's somewhat ambiguously stated. Let's clarify and explain.
The reference states: "if there are three 2 in the fraction of the number: it will be divisible by 8 otherwise not." This isn't a standard divisibility rule, and it's poorly phrased. A more practical way to think about divisibility by 8 is through direct division or related rules.
Let's consider this revised approach to divisibility by 8:
A two-digit number is divisible by 8 if the number itself is a multiple of 8. Here's how to check:
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Direct Division: The most straightforward method is to simply divide the two-digit number by 8. If the result is a whole number (no remainder), then the number is divisible by 8.
- For example, to check if 24 is divisible by 8, divide 24 by 8: 24 / 8 = 3. Since 3 is a whole number, 24 is divisible by 8.
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Memorization/Listing: You can memorize the multiples of 8 that fall within the two-digit range or list them out:
- 16, 24, 32, 40, 48, 56, 64, 72, 80, 88, 96
If the two-digit number is in this list, it is divisible by 8.
Examples:
- Is 32 divisible by 8? Yes, because 32 / 8 = 4, or 32 is in the list of multiples.
- Is 50 divisible by 8? No, because 50 / 8 = 6.25 (not a whole number), or 50 is not in the list of multiples.
- Is 88 divisible by 8? Yes, because 88 / 8 = 11, or 88 is in the list of multiples.
