alleryਬਿੰਦੀਆਂ 1, 3, 6, 10, 15 ਬਿੰਦੀਆਂ ਨਾਲ ਤਿਕੋਣ ਬਣਾਉਂਦੀਆਂ ਹਨ। ਅਗਲੇ ਵਿੱਚ ਕਿੰਨੇ ਬਿੰਦੀਆਂ ਹੋਣਗੀਆਂ?
A28
B21
C24
D20
Answer & Solution
Correct answer: B. 21
ਇਹ ਪਾੜੇ ਹਰ ਵਾਰ ਇੱਕ-ਇੱਕ ਕਰਕੇ ਵਧਦੇ ਹਨ (2, 3, 4, 5), ਇਸ ਲਈ ਅਗਲਾ ਪਾੜਾ 6 ਅਤੇ 15 + 6 = 21 ਹੈ।
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