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ਪਹਿਲੇ 10 ਕੁਦਰਤੀ ਸੰਖਿਆਵਾਂ ਦਾ ਜੋੜ ਕਿੰਨਾ ਹੈ?

A45
B50
C55
D60
Answer & Solution
Correct answer: C. 55
ਪਹਿਲੀਆਂ n ਕੁਦਰਤੀ ਸੰਖਿਆਵਾਂ ਦਾ ਜੋੜ = n(n+1)/2 = 10 * 11 / 2 = 55।
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