



If a number is divisible by both 2 and 14, is it necessarily divisible by 28? 184
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what is 28 divisible by Informational
- List all the composite divisors of 28. 159
- Does 28 have any common factors with 9? 164
- Does 28 have any common factors with 27? 172
- What is the greatest common divisor (GCD) of 28 and 14? 61
- Is 28 a practical number? (Every positive integer less than 28 can be expressed as a sum of distinct divisors of 28) 369
- Consider the number 28 in binary. Are any of the place values divisors of 28? 270
- What are the digits of 28? What is their sum? 393
- Consider the sequence of multiples of 28. What are the first few terms? 296
- If you divide 28 into seven equal groups, how many are in each group? 46
- Can you use Venn diagrams to illustrate the divisors of 28 and another number? 324
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