Subject
Quantitative Aptitude
Topic
Number
A 3-digit number 4a3 is added to another 3-digit number 984 to give a 4-digit number 13b7, which is divisible by 11. Then, (a + b)=?
A 3-digit number 4a3 is added to another 3-digit number 984 to give a 4-digit number 13b7, which is divisible by 11. Then, (a + b)=?
ক)
10খ)
11গ)
15ঘ)
noneExplanation
প্রশ্নে বলা হচ্ছে, 4a3 এর সাথে 984 যোগ করলে যোগফল হয় 13b7 যা আবার 11 দ্বারা বিভাজ্য। তাহলে, (a + b) = কত? দেয়া আছে, 4a3 984 _______ 13b7 যেহেতু, 13b7 সংখ্যাটি 11 দ্বারা বিভাজ্য তাই a + 8 = b হবে। = 1 হবে । এখানে, a = 0 অথবা, a = 1 হবে। a = 0 হলে b = 8. কিংবা a = 1 হলে b = 9 হবে। তাই সংখ্যাটি হয় 1387 বা 1397 হবে। কিন্তু 1387 সংখ্যাটি 11 দ্বারা বিভাজ্য নয় এবং 1397 সংখ্যাটি 11 দ্বারা বিভাজ্য। ∴ a + b=1 + 9 = 10 হবে।Related questions
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