Step-by-step Solution:

The number pair that is different from the others is 8:33.

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The Pattern Breakdown

The first three pairs all follow the same mathematical rule: the second number is one more than three times the first number.

You can write this as the formula: Y = (3 * X) + 1.

Applying the Rule:

• 15:46 → (3 * 15) + 1 = 45 + 1 = 46
• 12:37 → (3 * 12) + 1 = 36 + 1 = 37
• 9:28 → (3 * 9) + 1 = 27 + 1 = 28

The Odd One Out:

The pair 8:33 does not fit this pattern:

• (3 * 8) + 1 = 24 + 1 = 25

According to the rule, the second number should be 25, not 33. This makes 8:33 the one that is different.