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Three of the following four number pairs are alike in a certain way and one is different. Pick the odd one out.
78 : 127
61 : 97
56 : 136
25 : 89
- In pairs 78:127, 61:97, and 25:89, both numbers are primes or can be represented as primes adding up, where second number is larger.
- Pair 78:127 consists of the numbers separated by a gap, and primes are involved.
- Pair 61:97 has both numbers being prime numbers.
- Pair 25:89 includes a prime number, where second number is larger.
- Pair 56:136 is different because neither number is a prime, and they don't follow the prime connection logic.
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