Thus, if you pick any whole number, it will either be a prime number or you can build it by making use of a unique combination of prime numbers. Any whole number is said to be either a prime number or we can build it by multiplication of unique combination of prime numbers. We can consider prime numbers as the building blocks of numbers. Further, number 13 will have only 2 factors which are 1 and 13 so it is a prime number. As it has got more than 2 factors which are 1, 3, 5 and 15, it will be a composite number. It is because any whole number being greater than 1 will be prime or composite. Thus, you see that a composite number will be having more than 2 factors.įor instance, 1 will be neither be prime nor composite. On the other hand, any number which is greater than 1 and not a prime number will be a composite number. Similarly, if you cannot divide the number into equal groups, it is going to be a prime number. In other words, any whole number which is greater than 1 and is only divisible by 1 and itself will be referred to as a prime number.Īn easier way to understand this can be that if you can divide a number into equal groups, it won’t be a prime number. Ask them for example to make a number chart of odd numbers, a chart for a specific skip-counting pattern, or a chart where multiples of 4 are colored yellow.3 List of Prime Numbers from 1 to 100 Definition of Prime NumbersĪny whole number which is greater than 1 having precisely two factors, 1 and itself, is certified as a prime number. You can also let students use the generator to practice skip-counting concepts. With the generator, you can make customized number charts and lists. This interactive tool allows children to explore a 100-chart or a teacher to illustrate various math concepts, such as even and odd numbers, multiples of 5 and of 10, and skip-counting by 2, 3, 4, 5, and so on. List of multiples of 3 (which numbers are colored yellow?)Ĭount from 1 to 100, every fourth number is colored yellow Multiples of 4 chart every fourth number is highlighted in yellowįill in odd numbers from 1 to 201 - 70% of the numbers are missing Multiples of 3 chart every third number is highlighted in yellow Tip: Generate several charts for children to fill in, because each time the numbers that are missing will be different.ġ00-chart - 70% of the numbers are missingġ00-chart - 70% of the numbers are missing even numbers are highlighted Scroll down the page to the generator if you want to customize the charts yourself.ġ00-chart - half of the numbers are missing To get a different chart using the same options, press 'refresh' in the browser window (html only). The answer key is automatically included on the second page. With the exception of the two top ones (which are static), they are randomly generated each time you click on the button. Tip: use a negative step to practice counting backwards.īelow you will find some common charts both in html and PDF format. The charts can be made in html or PDF format (both are easy to print).Īnother feature is that you can highlight in yellow the boxes at certain intervals, which creates pretty skip-counting patterns. You can decide how much of the chart is pre-filled, the border color, skip-counting step, and so on. This generator makes number charts and lists of whole numbers and integers, including a 100-chart, for kindergarten and elementary school children to practice number writing, counting, and skip-counting.
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