UrbanPro
Login Ask & Answer Success Stories Paid Courses Free Classes Tuition & Classes Fees Write a Review All Categories Help Center
Post your Learning Need Signup as a Tutor
✕

Popular Cities

Bangalore

Hyderabad

Delhi

Mumbai

Chennai

Pune

Kolkata

Gurgaon

Ahmedabad

Jaipur

Noida

✕
true

Take Class 10 Tuition from the Best Tutors

  • Affordable fees
  • 1-1 or Group class
  • Flexible Timings
  • Verified Tutors

Book a Free Demo

Class 10 > Learn Class IX-X Tuition > How to add 1+2+3+4+....+100
✕

Search in

How to add 1+2+3+4+....+100

Akhilesh Choudhary
09/03/2017 0 0

Simple trick 

Let X=1+2+3+...+100

Now add same series in reverse order as

100+99+98+........+1  = X

Now 2X = 101+101+101+101+......100times 

So 2X= 101*100

2X= 10100

X=5050

This formula comes like this = n(n+1)/2 where n is the last number of the series 

0 Dislike
Follow 0

Please Enter a comment

Submit

Other Lessons for You

Basic Percentage Review short cut tricks
So what is the easiest way to calculate percentages? Here are some tips to quickly find percentages mentally. Think like this: There are some percentages that are easy to calculate mentally. 50% means...

Debraj Paul

3 0
0
Concept Of Average / Mean

Pradeep Gupta

0 0
0
Nomenclature For Organic Compounds
In organic chemistry nomenclature is one of the important topic we come across. This is introduce for studnets from school level. However we still find studnets making mistake in these types of easy questions....

Pratiksha R.

0 0
0
Concave Lens and Use of Convex Lenses - The Camera
A lens having both of its surfaces curved inwards is called as a concave lens. It is thin in the middle and thicker at the edges. It is also called as a diverging lens as it diverges a parallel beam of...

Debraj Paul

0 0
0
A Physics And Math Problem
Three small snails are each at a vertex of an equilateral triangle of side 60 cm. The first sets out towards the second, the second towards the third and the third towards the first, with a uniform speed...

Ajinkya Anant Jawalkar

0 0
0

Find Class 10 Tuition near you

Looking for Class 10 Tuition ?

Learn from Best Tutors on UrbanPro.

Book a Free Demo

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you

Class 10 Tuition Questions

What steps can be taken to control soil erosion in the hilly areas?

5 Answers

Find the zeroes of the quadratic polynomial x2 + 5x + 6 and verify the relationship between the zeroes and the coefficients.

5 Answers

what is combustion and oxidation?

28 Answers

What is the method of finding square root of 123454321 without actual calculation?

7 Answers

Who wrote "Vande Mataram"? When?

21 Answers

X

Looking for Class 10 Tuition Classes?

The best tutors for Class 10 Tuition Classes are on UrbanPro

  • Select the best Tutor
  • Book & Attend a Free Demo
  • Pay and start Learning

Take Class 10 Tuition with the Best Tutors

The best Tutors for Class 10 Tuition Classes are on UrbanPro

This website uses cookies

We use cookies to improve user experience. Choose what cookies you allow us to use. You can read more about our Cookie Policy in our Privacy Policy

Accept All
Decline All

UrbanPro.com is India's largest network of most trusted tutors and institutes. Over 55 lakh students rely on UrbanPro.com, to fulfill their learning requirements across 1,000+ categories. Using UrbanPro.com, parents, and students can compare multiple Tutors and Institutes and choose the one that best suits their requirements. More than 7.5 lakh verified Tutors and Institutes are helping millions of students every day and growing their tutoring business on UrbanPro.com. Whether you are looking for a tutor to learn mathematics, a German language trainer to brush up your German language skills or an institute to upgrade your IT skills, we have got the best selection of Tutors and Training Institutes for you. Read more

ThinkVidya Learning Pvt Ltd © 2010-2025All Rights Reserved