allery2, ?, 12, 20, 30 ত এটা পদ লুকাই আছে। লুকাই থকা সংখ্যাটো কি?
A6
B8
C4
D10
Answer & Solution
Correct answer: A. 6
পদবোৰে n x (n + 1) আৰ্হি অনুসৰণ কৰে: 1x2, 2x3, 3x4, 4x5, 5x6, গতিকে দ্বিতীয় পদটো হৈছে 6।
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