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Solution

✅ Correct Option: 1

Read each column downwards. In column 1 the changes are −12-12 then +6+6, and in column 2 they are +4+4 then −2-2: the second change is half the first with the sign reversed.

Applying this to column 3, let the first change be dd; then 18+d−d2=4018 + d - \frac{d}{2} = 40, so d=44d = 44 and the missing value is 18+44=6218 + 44 = 62.

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