एक पंक्ति में (1), दूसरी में (2), और इसी तरह (11)वीं पंक्ति तक बिंदु रखे गए। कुल बिंदु कितने होंगे?
Dots are placed with (1) in the first row, (2) in the second row, and so on up to the (11)th row. How many dots are there in total?
Explanation opens after your attempt
B. (66)
Concept
The total dots are \(1+2+\cdots+11=66\). Such an arrangement forms the sum of natural numbers.
Why this answer is correct
The correct answer is B. (66). The total dots are \(1+2+\cdots+11=66\). Such an arrangement forms the sum of natural numbers.
Exam Tip
कुल बिंदु \(1+2+\cdots+11=66\) होंगे। ऐसी व्यवस्था में प्राकृतिक संख्याओं का योग बनता है।
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