Home › RRB Group D › Quantitative Aptitude › Number Series › Find the missing term: 12, 20, 34, 57, ?
Find the missing term: 12, 20, 34, 57, ?
A93
B93.5
C94
D93.25
Answer & Solution
Correct answer: B. 93.5
1. The rule is ×1.5 then add 2, 4, 6, 8 successively.
2. 12×1.5 + 2 = 20; 20×1.5 + 4 = 34; 34×1.5 + 6 = 57.
3. Next: 57 × 1.5 + 8 = **93.5**.
_Source: IBPS RRB Officer Scale I Prelims PYQ (Examrace), Q.74_
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