Update

Muft Shiksha™ एक 100% Free Education Portal है 🇮🇳, जिसका उद्देश्य Class 9–12 के हर विद्यार्थी तक High-Quality Education को पूरी तरह मुफ्त पहुँचाना है। 🇮🇳 हम मानते हैं कि अच्छी शिक्षा किसी student की आर्थिक स्थिति पर निर्भर नहीं होनी चाहिए। 🇮🇳 हर विद्यार्थी को वही Quality Study Material, MCQs, Quizzes, Exam Preparation, Concept-Based Learning और Bilingual Support मिलना चाहिए, जो आमतौर पर महंगी Coaching या Premium Platforms में मिलता है। Muft Shiksha™ 🇮🇳 इसी सोच के साथ बनाया गया है

Subjects
0 reads0 ratings0 helpful

What will be the sum of the first 12 natural numbers?

Answer and explanation

Correct answer: 78

The governing concept is the sum of the first n natural numbers, represented by the triangular-number formula S_n = n(n + 1)/2. The first 12 natural numbers are 1, 2, 3, ..., 12, so n = 12. Substitution gives S_12 = 12 × 13 / 2. Dividing 12 by 2 first gives 6, and then 6 × 13 = 78. Therefore, option C is correct. Option A is too small, option B is not produced by the formula, and option D is too large. The phrase “first 12” means that every integer from 1 through 12 is included; it does not mean 12 × 12 or a list beginning with zero.

Related tags

MathematicsSequencesNatural-NumbersSumSum Of First N Natural NumbersSequences And ProgressionsClass 9 Mcq

Was this question useful?

No ratings yetWrite a review / Rate this question

Student Reviews

No published reviews yet.

Add Muft Shiksha to your Home Screen

In Safari, tap Share, then Add to Home Screen.