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বাংলা
Select the missing numbers from the given responses.
2, 10, 30, 68, ?
নীচের সিরিজে অনুপস্থিত সংখ্যা নির্বাচন করুন: 2, 10, 30, 68, ?
Practice MCQ for SSC, UPSC, RRB Exams
A. 125
A. 125
B. 130
B. 130
C. 128
C. 128
D. 135
D. 135
Correct Answer: B
সঠিক উত্তর: B
Explanation
ব্যাখ্যা
Given series:
2, 10, 30, 68, ?
Find the differences between consecutive terms:
10 − 2 = 8
30 − 10 = 20
68 − 30 = 38
Next, find the differences of these differences:
20 − 8 = 12
38 − 20 = 18
The second-level differences are increasing by
6
each time: 12, 18, … → next = 24
Next first-level difference = 38 + 24 =
62
Next term = 68 + 62 =
130
প্রদত্ত সিরিজ:
2, 10, 30, 68, ?
একইভাবে ধারাবাহিক সংখ্যাগুলোর পার্থক্য বের করুন:
10 − 2 = 8
30 − 10 = 20
68 − 30 = 38
এখন এই পার্থক্যগুলোর পার্থক্য বের করুন:
20 − 8 = 12
38 − 20 = 18
দ্বিতীয় স্তরের পার্থক্য
6 করে বৃদ্ধি পাচ্ছে
: 12, 18, … → পরবর্তী = 24
পরবর্তী প্রথম স্তরের পার্থক্য = 38 + 24 =
62
পরবর্তী সংখ্যা = 68 + 62 =
130
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