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Number Sequence: 18, 14, 12, 11, ? , 10.25
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Find the missing number in the series: 18, 14, 12, 11, ?, 10.25

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The missing number is 10.5
Divide each number shown by 2 and then add 5 to get next number in the sequence
18/2+5=14
14/2+5=12
12/2+5=11
11/2+5=10.50
10.5/2+5=10.25

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