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Find the difference between the median and mean of factors of 42. The factors of 21 are 1, 3, 7, 21 and its negative factors are -1, -3, -7, -21. The pair of numbers which gives 32 when multiplied is known as factor pairs of 21.

The factor of 21 is that number that divides 21 completely i.e., without any remainder. The heights of 8 girls of a class are 140, 142, 135, 133, 137, 150, 148 and 138 respectively. Find the mean height of these girls and their median height. The mean of a certain number of observations is 32. Find the resulting mean, if the observation is, increased by 60%. 3.3, 3.2, 3.1, 3.7, 3.6, 4.0, 3.5, 3.9, 3.8, 4.1, 3.5, 3.8, 3.7, 3.9 and 3.4.

## Find the mean and median of all the positive factors of 72.

Explore factors using illustrations find the medians of factors of 21 and interactive examples.

- A composite number is an integer that is divided by at least another natural number, apart from itself and 1, without leaving a remainder.
- The pair of numbers which gives 32 when multiplied is known as factor pairs of 21.
- Math will no longer be a tough subject, especially when you understand the concepts through visualizations.
- The sum of all factors of 21 is 32 and its factors in Pairs are and .

In other words, because 21 can be divided by one, itself and by 3 and 7, thus it is a composite number. A composite number is an integer that is divided by at least another natural number, apart from itself and 1, without leaving a remainder. The positive factors of 21 are all the numbers we can divide to obtain an even number. The factors of 21 are all the integers that divide 21 without any remainder. The mean of marks scored by 100 students was found to be 40, later on, it was discovered that a score of 53 was misread as 83.

## What are the Prime Factors of 21?

Following data shows the weekly wages (in ₹) of 10 workers in a factory. The median is the middle number in a data set when the numbers are listed in either ascending or descending order. Math will no longer be a tough subject, especially when you understand the concepts through visualizations. 21 candies are to be divided among 3 friends equally. Factors of 12 and 21 are the numbers that divide exactly without any remainder.

What’s amazing is that 21 divided by a factor of 21 will be equivalent to another factor of 21. These can be thus expressed as either individual factors or as paired factors. This is typically a mathematical dissolution of a specific number. Hence, 4th observation in ascending order of given observations is median of the given data. Find the mean and median of all the positive factors of 72. The number 21 is actually the product of two positive numbers other than 1 and itself which makes it a composite number.

## Chapter 21: Data Handling

Maximum students of CISCE Class 7 prefer Selina Textbook Solutions to score more in exam. If there does not exist any common factor, the HCF is 1. This is also called the greatest common factor and is a crucial component of the common prime factors of two numbers. It is the largest factor or we can say the largest number the two numbers share as a prime factor. Factors of 21 are integers that can be divided evenly into 21.

Selina textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students. Factors of 21 have 4 positive factors and 4 negative factors. Step by step solution by experts to help you in doubt clearance & scoring excellent marks in exams. We can simply find the least common multiple of https://1investing.in/ 21 through an easy solution that rests in the lowest common multiple of two numbers. The least common factor or we shall say the smallest number in common of any pair of integers is 1. Factors of 21 are actually all the integers that mean the entire positive, negative and whole numbers that we can divide into 21 evenly.

## Related questions

It has a total of 4 factors of which 21 is the biggest factor and the positive factors of 21 are 1, 3, 7, and 21. The sum of all factors of 21 is 32 and its factors in Pairs are and . Further, we at Shaalaa.com provide such solutions so that students can prepare for written exams.

## Factors of 21

Selina solutions for Concise Mathematics Class 7 ICSE chapter 21 include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the CISCE Concise Mathematics Class 7 ICSE solutions in a manner that help students grasp basic concepts better and faster. The questions involved in Selina Solutions are important questions that can be asked in the final exam.