Mental Math – 4th Grade
1. The concert started at 6:45 and ended at 8:00. How many minutes was the concert?
2. What is the perimeter, in centimeters, of a rectangle with sides measuring ten and fifteen
centimeters?
3. What is the greatest common factor of twelve and twenty-seven?
4. How many inches are in four yards?
5. What number times twelve is one-hundred-thirty-two?
SWITCH TEAM MEMBERS
6. What is the largest prime number less than fifty?
7. Find five squared and subtract three squared.
8. What is the volume of a cube with five-centimeter sides?
9. As a reduced fraction, what is one-half minus one-third?
10. What is the least common multiple of sixteen and twenty-four?
SWITCH TEAM MEMBERS
11. What is the area, in square centimeters, of a right triangle with legs measuring five and eight
centimeters?
12. How many hours will it take to travel three-hundred miles at a speed of twenty miles per hour?
13. A bag contains three blue marbles and two red marbles. When one marble is drawn from the bag,
what is the probability, as a percent, that it is blue?
14. What is the remainder when eighty-five is divided by seven?
15. What is the sum of the first six even positive integers?
SWITCH TEAM MEMBERS
16. What is the largest number less than fifty that is a multiple of seven?
17. How many prime numbers are less than twenty?
18. What is the surface area of a cube with sides of two inches?
19. What is the result when half of seventy-four is reduced by eight?
20. What is three-fourths of eight-hundred?
Mental Math – 5th Grade
1. What is the perimeter, in centimeters, of a rectangle with sides measuring ten and fifteen
centimeters?
2. What is the greatest common factor of twelve and twenty-seven?
3. How many inches are in four yards?
4. What number times twelve is one-hundred-thirty-two?
5. Express the decimal zero point six as a reduced fraction.
SWITCH TEAM MEMBERS
6. Find five squared and subtract three squared.
7. What is the volume of a cube with five-centimeter sides?
8. As a reduced fraction, what is one-half minus one-third?
9. What is the least common multiple of sixteen and twenty-four?
10. Express four and three-sevenths as an improper fraction.
SWITCH TEAM MEMBERS
11. How many hours will it take to travel three-hundred miles at a speed of twenty miles per hour?
12. A bag contains three blue marbles and two red marbles. When one marble is drawn from the bag,
what is the probability, as a percent, that it is blue?
13. What is the remainder when eighty-five is divided by seven?
14. What is the sum of the first six even positive integers?
15. What do you get when you multiply the sum of five and eight by nine?
SWITCH TEAM MEMBERS
16. How many prime numbers are less than twenty?
17. What is the surface area of a cube with sides of two inches?
18. What is the result when half of seventy-four is reduced by eight?
19. What is three-fourths of eight-hundred?
20. How many seconds are in two hours?
Mental Math – 6th Grade
1. What is the greatest common factor of twelve and twenty-seven?
2. How many inches are in four yards?
3. What number times twelve is one-hundred-thirty-two?
4. Express the decimal zero point six as a reduced fraction.
5. What is twice the sum of eighteen and thirty-three?
SWITCH TEAM MEMBERS
6. What is the volume of a cube with five-centimeter sides?
7. As a reduced fraction, what is one-half minus one-third?
8. What is the least common multiple of sixteen and twenty-four?
9. Express four and three-sevenths as an improper fraction.
10. How many seconds are in three and a quarter minutes?
SWITCH TEAM MEMBERS
11. A bag contains three blue marbles and two red marbles. When one marble is drawn from the bag,
what is the probability, as a percent, that it is blue?
12. What is the remainder when eighty-five is divided by seven?
13. What is the sum of the first six even positive integers?
14. What do you get when you multiply the sum of five and eight by nine?
15. What percent of twelve is three?
SWITCH TEAM MEMBERS
16. What is the surface area of a cube with sides of two inches?
17. What is the result when half of seventy-four is reduced by eight?
18. What is three-fourths of eight-hundred?
19. How many seconds are in two hours?
20. Joe invests four hundred-fifty dollars, which doubles but then loses three-hundred and forty-two
dollars of its value. How much is Joe’s investment worth?
Mental Math – 7th Grade
1. How many inches are in four yards?
2. What number times twelve is one-hundred-thirty-two?
3. Express the decimal zero point six as a reduced fraction.
4. What is twice the sum of eighteen and thirty-three?
5. A number is doubled, and then this result is increased by one-hundred-forty, producing threehundred-twenty-eight. What is the number?
SWITCH TEAM MEMBERS
6. As a reduced fraction, what is one-half minus one-third?
7. What is the least common multiple of sixteen and twenty-four?
8. Express four and three-sevenths as an improper fraction.
9. How many seconds are in three and a quarter minutes?
10. What is two-thirds of twenty-one?
SWITCH TEAM MEMBERS
11. What is the remainder when eighty-five is divided by seven?
12. What is the sum of the first six even positive integers?
13. What do you get when you multiply the sum of five and eight by nine?
14. What percent of twelve is three?
15. What is the ninth prime number?
SWITCH TEAM MEMBERS
16. What is the result when half of seventy-four is reduced by eight?
17. What is three-fourths of eight-hundred?
18. How many seconds are in two hours?
19. Joe invests four hundred-fifty dollars, which doubles but then loses three-hundred and forty-two
dollars of its value. How much is Joe’s investment worth?
20. When a positive number is decreased by seven and then squared, the result is one-hundred-fortyfour. What is the number?
Mental Math – 8th Grade
1. How many inches are in four yards?
2. What number times twelve is one-hundred-thirty-two?
3. Express the decimal zero point six as a reduced fraction.
4. What is twice the sum of eighteen and thirty-three?
5. A number is doubled, and then this result is increased by one-hundred-forty, producing threehundred-twenty-eight. What is the number?
SWITCH TEAM MEMBERS
6. As a reduced fraction, what is one-half minus one-third?
7. What is the least common multiple of sixteen and twenty-four?
8. Express four and three-sevenths as an improper fraction.
9. How many seconds are in three and a quarter minutes?
10. What is two-thirds of twenty-one?
SWITCH TEAM MEMBERS
11. What is the remainder when eighty-five is divided by seven?
12. What is the sum of the first six even positive integers?
13. What do you get when you multiply the sum of five and eight by nine?
14. What percent of twelve is three?
15. What is the ninth prime number?
SWITCH TEAM MEMBERS
16. What is the result when half of seventy-four is reduced by eight?
17. What is three-fourths of eight-hundred?
18. How many seconds are in two hours?
19. Joe invests four hundred-fifty dollars, which doubles but then loses three-hundred and forty-two
dollars of its value. How much is Joe’s investment worth?
20. When a positive number is decreased by seven and then squared, the result is one-hundred-fortyfour. What is the number?