Arithmetic


 

Arithmetic logoSubject: Mathematics    Exam: NTSE

Chapter Rating: Do or Die (Most Important)

Topic Weightage: 0.15


Practice QuestionsRevise Chapter

Start a discussion on this chapter




Posting your doubt

Post Discussion

Doubts and Discussions on this chapter

KDSVSRK started a discussion - x to the power y = y to the po... - Participate

Sandeep Ku... started a discussion - What is speed - Participate

RIYA KUMAR... started a discussion - 13/1 - Participate

ADITYAPAWA... started a discussion - i think it is 7:.5 - Participate

ADITYAPAWA... started a discussion - i think it is 7:.5 - Participate

Important Concepts in Arithmetic

Find notes, videos, important points and questions to practice on each of these concepts.

  • Speed, Time and Distance

  • Work

  • Age

  • Pipes and Cisterns



My Chapter Prep Status

Chapter Completion: 0%

Your GEM Score: 0

Check your Good Enough Meter (GEM)

Chapter Expert Trophy

sowmya


How can you win?
You need to score more than 302 marks to beat sowmya


Others In The Race!
Apoorva Kalmani, harmish, paul

Important Points

A ratio is a comparison of two numbers. We generally separate the two numbers in the ratio with a colon (:). Suppose we want to write the ratio of 8 and 12.
To compare ratios, write them as fractions. The ratios are equal if they are equal when written as fractions.
Remember to be careful! Order matters! A ratio of 1:7 is not the same as a ratio of 7:1.
A proportion is an equation with a ratio on each side. It is a statement that two ratios are equal. Four (non-zero) quantities of the same kind a, b, c, d are in proportion, written as a : b :: c : d if a/b = c/d
When one of the four numbers in a proportion is unknown, cross products may be used to find the unknown number. This is called solving the proportion. Question marks or letters are frequently used in place of the unknown number.
 
SimplyLearnt
Sign Up to Study Arithmetic