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# Halloween Prime or Composite

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## Halloween Prime or Composite Answer Key

Instructions: Put your "spooktacular" math skills to the test! Decide if the number described in each Halloween word problem is prime or composite.

1.
A spider spins a web that measures 29 centimeters across. Is the number 29 prime or composite?
1. prime
2. composite

2.
Miko carves a jack-'o-lantern. She removes 84 seeds from the pumpkin. Is 84 a prime or composite number?
1. prime
2. composite
3.
There are 57 bats in a cave. Is the number 57 a prime or composite number?
1. prime
2. composite

4.
A ghost haunts 17 houses on Halloween night. Is the number 17 prime or composite?
1. prime
2. composite
5.
Mrs. Frankenstein is hanging plastic skull lanterns for Halloween. She starts with 47 lanterns, but breaks 13 while trying to hang them. Is the number of remaining skull lanterns prime or composite?
1. prime
2. composite

6.
Bella enjoys a warm cup of cider after trick-or-treating. The cider's temperature is seventy-one degrees Celsius. Is the temperature of the cider a prime or composite number?
1. prime
2. composite
7.
Three black cats sit on a fence. Eight more black cats join them. Is the total number of black cats prime or composite?
1. prime
2. composite

8.
A witch is brewing a potion for Halloween. The recipe calls for 23 drops of ghoul drool. The witch adds the 23 drops to the potion, plus another 9 drops for good measure. Is the total number of drops of ghoul drool prime or composite?
1. prime
2. composite
9.
Thirty-nine children at Spooky Hollow Elementary School dress-up as witches for Halloween. Fourteen of the children wear witch masks and the remaining children use green face paint. Is the number of children who use face paint prime or composite?
1. prime
2. composite

10.
A crystal ball glows blue for 24 seconds then glows red for 35 seconds. Is the total number of seconds the crystal ball glows blue and red a prime or composite number?
1. prime
2. composite
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