Prime and Composite Worksheets Grade 4

1. Noah is helping his teacher organize the classroom library. He has 53 books to put on shelves. He wants to arrange them so that each shelf has the same number of books, with no books left over. Can Noah arrange the 53 books into equal groups on shelves? Explain why 53 is a prime or composite number.
2. Noah is drawing a number chart on a 6 by 6 grid. He shades all the prime numbers between 1 and 36. How many numbers does Noah shade?
3. Matiu is looking at a grid of numbers. The grid has numbers arranged in rows and columns. In one row, he sees the numbers 24, 31, 42, and 53. Matiu wants to color all the composite numbers in that row blue and all the prime numbers red. How many numbers in the row will he color blue?

…and 5 more problems

1. A rectangular swimming pool is drawn on a grid. The pool is 15 meters long and 10 meters wide. A square diving area with sides of 4 meters is marked off in one corner of the pool. What is the area, in square meters, of the swimming pool that is NOT part of the diving area?
2. Emma is drawing a number grid on a large piece of paper. The grid has 10 rows and 10 columns, with numbers from 1 to 100 arranged in order. She circles all the prime numbers in the grid. Look at the fifth row: 41, 42, 43, 44, 45, 46, 47, 48, 49, 50. How many numbers in this row does Emma circle?
3. Is 37 a prime number?

…and 3 more problems

1. Noah is organizing his baseball card collection into albums. He has 127 cards and wants to put the same number of cards on each page. If he uses 7 pages, will there be any cards left over? Explain how you know.
2. Noah is organizing his baseball card collection into albums. He has 127 cards and wants to put the same number of cards on each page. If he uses 7 pages, will he be able to place all cards equally with none left over? Explain why or why not.
3. A baker is arranging cupcakes on trays for a large order. She has 127 cupcakes and wants to arrange them in rows with the same number of cupcakes in each row. If she can only use arrangements where the number of cupcakes per row is greater than 1, how many different ways can she arrange the cupcakes?

…and 3 more problems