Question Number 133009 by shaker last updated on 18/Feb/21
Commented by liberty last updated on 18/Feb/21
$$?\:=\:\mathrm{1} \\ $$
Answered by Rasheed.Sindhi last updated on 18/Feb/21
$$?=\mathrm{0}\:{or}\:\mathrm{1} \\ $$$${In}\:{case}\:\:?=\mathrm{0} \\ $$$$\mathrm{7}+\mathrm{0}=\mathrm{7}\:\left({The}\:{number}\:{in}\:{opposite}\:{position}\right) \\ $$$$\mathrm{8}+\mathrm{0}=\mathrm{8}\:\left({The}\:{number}\:{in}\:{opposite}\:{position}\right) \\ $$$$\mathrm{9}+\mathrm{0}=\mathrm{9}\:\left({The}\:{number}\:{in}\:{opposite}\:{position}\right) \\ $$$${In}\:{case}\:\:?=\mathrm{1} \\ $$$$\mathrm{7}×\mathrm{1}=\mathrm{7}\:\left({The}\:{number}\:{in}\:{opposite}\:{position}\right) \\ $$$$\mathrm{8}×\mathrm{1}=\mathrm{8}\:\left({The}\:{number}\:{in}\:{opposite}\:{position}\right) \\ $$$$\mathrm{9}×\mathrm{1}=\mathrm{9}\:\left({The}\:{number}\:{in}\:{opposite}\:{position}\right) \\ $$