Solving for Unknowns in Real-World Math Problems

A farmer has chickens and cows. If the number of chickens is twice the number of cows, and there are 12 cows, how many chickens are there?

• 12

• 36

• 18

• 24

Lisa has a collection of stickers. If she has 3 times as many star stickers as heart stickers and she has 15 heart stickers, how many star stickers does she have?

• 15 star stickers

• 60 star stickers

• 30 star stickers

• 45 star stickers

Tom and Jerry are collecting marbles. If Tom has 5 more marbles than Jerry and together they have 35 marbles, how many marbles does Jerry have?

• 20

• 10

• 25

• 15

A bookstore sells fiction and non-fiction books. If the number of fiction books is 4 less than twice the number of non-fiction books and there are 10 non-fiction books, how many fiction books are there?

• 12

• 20

• 16

• 8

In a class, the number of boys is 3 more than the number of girls. If there are 20 students in total, how many boys are in the class?

• 12

• 15

• 9

• 11

A recipe requires 2 cups of flour for every 3 cups of sugar. If you have 6 cups of sugar, how many cups of flour do you need?

• 3 cups of flour

• 4 cups of flour

• 6 cups of flour

• 2 cups of flour

Sarah has a total of 50 candies. If she gives away 8 candies to her friend, how many candies does she have left?

• 42

• 30

• 45

• 40

A car travels 60 miles in 1 hour. If it continues at the same speed, how far will it travel in 3 hours?

• 180 miles

• 200 miles

• 150 miles

• 120 miles

A box contains red and blue balls. If there are 5 more red balls than blue balls and there are 20 balls in total, how many blue balls are there?

• 7

• 10

• 5

• 12

In a school, the number of students in the 6th grade is 10 less than twice the number of students in the 5th grade. If there are 30 students in the 5th grade, how many students are in the 6th grade?

• 70

• 50

• 60

• 40