Answer the following question.
There are 9 boys and 12 girls in a class. The teacher needs to create groups with three members for their class activity. How many groups are formed?
Step-by-step reasoning process: There are 9 + 12 = 21 students in a class. Hence, 21 / 3 = 7 groups are formed.
The answer is 7.

Answer the following question.
Iris' family is planning a surprise birthday party for her. The party will include her 3 uncles and 4 aunts who have a son and daughter each as well as her brother and mother. In total, how many people are coming to Iris' birthday party?
Step-by-step reasoning process: Each of her aunts and uncles have a family unit of 1 son + 1 daughter + 1 aunt / uncle = 3 people. Iris has a total of 3 uncles + 4 aunts = 7 aunts or uncles in these family units. So among her aunts, uncles, and cousins, there will be 7 family units * 3 people in each family unit = 21 people. Including her mother and brother, there will be a total of 21 people + 1 mother + 1 brother = 23 people coming to her party.
The answer is 23.

Answer the following question.
If the number of dogs in the neighborhood was originally half the number of cats in the neighborhood before twenty new dogs were born, and now there are twice as many dogs as cats, how many cats were in the neighborhood, to begin with, if there are 20 cats now?
Step-by-step reasoning process: Now there are twice as many dogs as cats, and if the number of cats is 20, there are 2 * 20 = 40 dogs. Before twenty new ones were born, the number of dogs in the neighborhood originally was 40 - 20 = 20. If the number of dogs in the neighborhood was originally half the number of cats in the neighborhood, there were 20 * 2 = 40 cats in the neighborhood.
The answer is 40.

Answer the following question.
Kylie makes 10 beaded necklaces on Monday and 2 beaded necklaces on Tuesday. Then Kylie makes 5 beaded bracelets and 7 beaded earrings on Wednesday. 20 beads are needed to make one beaded necklace. 10 beads are needed to make one beaded bracelet. 5 beads are needed to make one beaded earring. How many beads does Kylie use in total to make her jewelry?
Step-by-step reasoning process: Kylie makes 10 + 2 = 12 beaded necklaces. The number of beads used for the necklaces is 12 * 20 = 240 beads. The number of beads used for the bracelets is 5 * 10 = 50 beads. The number of beads used for the earrings is 7 * 5 = 35 beads. The total number of beads used is 240 + 50 + 35 = 325 beads.
The answer is 325.