Question Number 6722 by Rasheed Soomro last updated on 16/Jul/16
$${If}\: \\ $$$$\:\:\:\:\:\:\:\:\:\mathrm{8789}=\mathrm{89} \\ $$$$\:\:\:\:\:\:\:\:\:\mathrm{7690}=\mathrm{79} \\ $$$$\:\:\:\:\:\:\:\:\:\mathrm{5478}=\mathrm{69} \\ $$$${then} \\ $$$$\:\:\:\:\:\:\:\:\:\:\mathrm{5230}=? \\ $$