alleryबिंदुओं द्वारा 1, 3, 6, 10, 15 बिंदुओं वाले त्रिभुज बनाए जाते हैं। अगले त्रिभुज में कितने बिंदु होंगे?
A28
B21
C24
D20
Answer & Solution
Correct answer: B. 21
प्रत्येक बार अंतर 1 बढ़ता है (2, 3, 4, 5), अतः अगला अंतर 6 होगा और 15 + 6 = 21 प्राप्त होगा।
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