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Solution

✅ Correct Option: 4

Series: 10.5, 7.5, ?, 3.0, 1.5, 0.5. Differences decrease by 0.5 each time: −3,−2.5,−2,−1.5,−1-3, -2.5, -2, -1.5, -1. So 7.5−2.5=5.07.5 - 2.5 = 5.0, giving the sequence 10.5, 7.5, 5.0, 3.0, 1.5, 0.5.

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