Question discussion

26, 12, 11, 15.5, 30, ?

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Discussion 1

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Solution
$\frac{26}{2/1}-1$ = 12
$\frac{12}{2/2}-1$ = 11
$\frac{11}{2/3}-1$ = 15.5
$\frac{15.5}{2/4}-1$ = 30
$\frac{30}{2/5}-1$ = 74