true

Take Class 8 Tuition from the Best Tutors

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

Search in

How to solve arithmetic series easily without remembering any formula?

23/05/2017 0 0

1+2+3+4+5+.........100(100 terms)

it can be seen as follows:

1+2+3+4+5+.......+95+96+97+98+99+100

can be rewritten as follows:

(1+100)+(2+99)+(3+98)+(4+97)+(5+96)........so on

every term become 101 this way and the number of such terms will be half as it was before

so before it was 100 terms, now it is 50 terms.

which is 101*50=5050

0 Dislike

Other Lessons for You

English Language
Exercise on Modals: (Class 8) Why ________ I care about your problems? (Can/should) Tom and Rebecca give their daughter a lot of presents. They ________ really love her. (can/must) We ________ go...
M

M. Mallick

10 Study Tips
*Be Positive *Set Study Goals *Make a Study Plan *Make your Own Notes *Mind Mapping *Test Yourself
S

Suresh

Is DNA repair enzyme tyrosyl DNA phosphodiesterase 1(TDP1) is a co-target with human DNA topoisomerase I in anticancer therapy?
DNA topoisomerase I (Top1) regulate DNA supercoiling both in the nucleus and mitochondria to enable reliable transmission of our genetic information to the offspring. However, Top1 are toxic when trapped...

Tips to improve vocabulary
1. Research shows that the vast majority of words are learned from context. To improve your context skills pay close attention to how words are used. 2. Learning a word won't help very much if you promptly...
A

Ayushi Garg

Linear magnification of a mirror
Linear magnification of a mirror is the ratio of height of the image to the total height of the object, thus, Linear magnification = Height of Image Height of Object If “h1” be the height...

Looking for Class 8 Tuition ?

Learn from Best Tutors on UrbanPro.

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you

Define humidity.

X

Looking for Class 8 Tuition Classes?

The best tutors for Class 8 Tuition Classes are on UrbanPro

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

Take Class 8 Tuition with the Best Tutors

The best Tutors for Class 8 Tuition Classes are on UrbanPro