2 2. 100 اور 200 کے درمیان تمام قوتی عددوں کا مجموعہ جو 7 سے قسمت ہوں۔
(A) 1320 (B) 1280 (C) 1200 (D) 1300
جواب ہے: (C)
قدم بقدم حل:
100 اور 200 کے درمیان 7 کے متعددات کی تعداد = (196 - 105)/7 + 1 = 14
ان عددوں کا مجموعہ = 7*10 = 70
100 7 سے قسمت نہیں ہے، لیکن 200 ہمیشہ قسمت نہیں ہے۔ لہٰذا جواب 70 - 100 = -30 ہے۔
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