alleryएक संख्या को तीन गुना किया जाता है, फिर 4 घटाया जाता है, जिससे 23 प्राप्त होता है। संख्या है?
A7
B10
C8
D9
Answer & Solution
Correct answer: D. 9
ऑपरेशन को पूर्ववत करने पर (23 + 4) ÷ 3 = 9 प्राप्त होता है।
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