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বাংলা
Select the missing numbers from the given responses.
90, 84, 86, 80, ? , 76, 78
নিচের ধারাটি থেকে অনুপস্থিত সংখ্যাটি নির্বাচন করুন।
90, 84, 86, 80, ?, 76, 78
Practice MCQ for SSC, UPSC, RRB Exams
A. 87
A. 87
B. 82
B. 82
C. 77
C. 77
D. 89
D. 89
Correct Answer: B
সঠিক উত্তর: B
Explanation
ব্যাখ্যা
Step-by-step pattern:
90 → 84 :
−6
84 → 86 :
+2
86 → 80 :
−6
80 → ? :
+2
? → 76 :
−6
76 → 78 :
+2
The series follows a repeating pattern of
−6, +2
.
So, the missing number is:
80 + 2 = 82
.
ধাপে ধাপে পরিবর্তন:
90 → 84 :
6 বিয়োগ
84 → 86 :
2 যোগ
86 → 80 :
6 বিয়োগ
80 → ? :
2 যোগ
? → 76 :
6 বিয়োগ
76 → 78 :
2 যোগ
অর্থাৎ ধারাটি
6 বিয়োগ ও 2 যোগ
এই নিয়মে চলছে।
সুতরাং অনুপস্থিত সংখ্যাটি হলো:
80 + 2 = 82
।
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