If all(num%i!=0 for i in range(2,int(math.sqrt(num))+1)):įor small numbers like 101 it doesn't matter, but for 10**8 the difference will be really big. You can write the same much shorter and more pythonic: for num in range(2,101):Īs I've said already, it would be better to check divisors not from 2 to n-1, but from 2 to sqrt(n): import math If n is divisible by any of the numbers, it is not prime. 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.You need to check all numbers from 2 to n-1 (to sqrt(n) actually, but ok, let it be n). You can also let students use the generator to practice skip-counting concepts.

$list of prime numbers to 100 chart$

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.

List of prime numbers to 100 chart