allery2, 3, 5, ?, 11, 13 జాబితాలో ఒక ప్రధాన సంఖ్య తప్పిపోయింది. అది ఏది?
A6
B8
C7
D9
Answer & Solution
Correct answer: C. 7
6, 8 మరియు 9 సంయుక్త సంఖ్యలు కాబట్టి, 5 మరియు 11 మధ్య ఉండే ప్రధాన సంఖ్య 7.
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