Question Number 191025 by Rupesh123 last updated on 16/Apr/23
Commented by Rasheed.Sindhi last updated on 17/Apr/23
$${n}=\mathrm{8} \\ $$$$\overset{×} {\mathrm{1}},\overset{×} {\mathrm{2}},\mathrm{3},\overset{×} {\mathrm{4}},\mathrm{5},\overset{×} {\mathrm{6}},\mathrm{7} \\ $$$$\:\:\:\:\left(\mathrm{1},\mathrm{2},\mathrm{4},\mathrm{6}\:{are}\:{not}\:{relatively}\:{prime}\right) \\ $$$$\mathrm{3},\mathrm{5},\mathrm{7}\:{are}\:{in}\:{AP} \\ $$