Prime and Composite Worksheets Grade 4

1. A rectangular garden is drawn with a length of 15 meters and a width of 12 meters. A triangular flower bed is placed in one corner of the garden, with its right angle at the corner. The triangle has legs measuring 5 meters and 6 meters. What is the area of the garden that is NOT covered by the flower bed?
2. A rectangular garden is drawn with a length of 12 meters and a width of 8 meters. The gardener plants flowers in a square section that measures 4 meters on each side in one corner. What is the area of the garden that is NOT covered by the flower section?
3. Liam is organizing his rock collection into display cases. He has 127 rocks and wants to put the same number of rocks in each case. If he uses 7 cases, will there be any rocks left over? Explain how you know.

…and 1 more problems

1. Is 37 a prime number?
2. Emma is organizing her sticker collection into equal groups for a school project. She has 121 stickers total. If she tries to make groups with exactly 11 stickers in each group, will she be able to use all her stickers with none left over? Explain why or why not.
3. Emma is organizing her rock collection into display cases. She has 127 rocks and wants to arrange them into equal rows. If she tries to make 7 equal rows, will she have any rocks left over? Explain how you know.

…and 4 more problems

1. Emma is organizing her rock collection into display cases. She has 121 rocks and wants to arrange them into equal rows. If she tries to make 11 equal rows, will she have any rocks left over? Explain how you know whether 121 is a prime or composite number.
2. A rectangular garden is drawn on grid paper. The garden is 12 units long and 8 units wide. If each grid square represents 1 square meter, what is the area of the garden?
3. Is 91 a prime number or a composite number?

…and 2 more problems