alleryयदि 7-अंकीय संख्या 5432y71, 9 से विभाज्य है, तो एकल-अंक y का मान क्या है?
A5
B6
C7
D4
Answer & Solution
Correct answer: A. 5
अंकों का योग = 5 + 4 + 3 + 2 + y + 7 + 1 = 22 + y। 9 से विभाज्यता के लिए 22 + y = 27 होना चाहिए, जिससे y = 5 प्राप्त होता है।
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