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Three of the following four numbers are alike in a certain way and one is different. Pick the number that is different from the
rest.
28
217
338
65
- Option 1: 28
- 28 is not a cube number.
- It is the product of prime numbers 2 and 7 (2^2 * 7).
- Option 2: 217
- 217 is a cube number.
- 217 can be expressed as 6^3 + 1.
- Option 3: 338
- 338 is not a cube number.
- It is the sum of prime numbers 2 and 169 (2 * 169).
- Option 4: 65
- 65 is not a cube number.
- It is the product of prime numbers 5 and 13.
The commonality among the numbers is that three are formed using simple operations or properties. However, only Option 2: 217 is related to cubes.
- The correct answer is Option 2: 217
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