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 value of (1+2+3+\cdots+33)?

Answer and explanation

Correct answer: 561

The sum of the first \(n\) natural numbers is \(\frac{n(n+1)}{2}\). Here, \(n=33\), so \(\frac{33\times34}{2}=33\times17=561\). Option 544 can result from incorrectly using 32 instead of 33, but the sum runs from 1 to 33. Exam tip: take the last number as \(n\) and apply \(\frac{n(n+1)}{2}\) directly.

Related tags

Sequences And ProgressionsNatural NumbersSum FormulaArithmetic SeriesClass 9 MathematicsSum Of First N Natural NumbersMathematicsClass 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.