alleryप्रत्येक अक्षर का एक अलग निश्चित अंक होता है। NOON का कोड कौन सा हो सकता है?
A1223
B1221
C1212
D1122
Answer & Solution
Correct answer: B. 1221
NOON को समान पहले और चौथे अंक और समान दूसरे और तीसरे अंक की आवश्यकता होती है, जो केवल 1221 को संतुष्ट करता है।
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