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Official Specimen Paper 1 · Q16

Paper 1Number & counting

Given that cc and dd are non-zero integers, the expression

10c−2d×202c+d8c×125c+d\frac{10^{c-2d}\times20^{2c+d}}{8^c\times125^{c+d}}

is an integer if

Ac<0c<0
Bd<0d<0
Cc<0c<0 and d<0d<0
Dc<0c<0 and d>0d>0
Ec>0c>0 and d<0d<0
Fc>0c>0 and d>0d>0
Gd>0d>0
Hc>0c>0

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