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Identify the odd one: 2, 3, 5, 7, 11, 13, 17, 20

A17

B13

C20

D11

Answer:

C. 20

Read Explanation:

All the numbers except one are prime numbers:

2, 3, 5, 7, 11, 13, 17 → all prime
20 → not a prime (it is divisible by 2, 4, 5, etc.)

Answer: 20


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