Subject
Bank Exam
Topic
Dutch-Bangla Bank Ltd. - Probationary Officer - 2017
If 0 < x < 4 and y < 6, which of the following cannot be the value of xy ?
If 0 < x < 4 and y < 6, which of the following cannot be the value of xy ?
ক)
-2খ)
0গ)
6ঘ)
NoneExplanation
Solution: 0 < x < 4 এর ক্ষেত্রে x = 1 আর y < 6 এর ক্ষেত্রে, y = -2 হলে xy = (1) (-2) = -2 তাই অপশন a) বাদ । একইভাবে, y = 0 হলে xy = 1 0 = 0 তাই অপশন b) বাদ । সেভাবে, y = 2 এবং x = 3 হলে, xy = 3 2 = 6 তাই অপশন c) ও বাদ । এজন্য উত্তর হবে অপশন d). Shortcut: দেওয়াআছে, 0 < x < 4 কাজেই ধরি, x = 1, 2, 3 এবং যেহেতু y < 6, কাজেই ধরি, y = 5,4,3,2,1,0, -1, -2 .............. তাই দেখা যাচ্ছে যে, অপশনের a), b) কিংবা c) xy এর value হতে পারে । তাই উত্তর d).Related questions
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