Math Brain Quiz Online – 20 Free Practice Questions
Test your logic and problem-solving skills with this Math Brain Quiz. Includes 20 free practice questions with clear, teacher-style explanations for students of all levels.
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#1. What is the value of 8 × (5 + 3)?
Explanation: First solve the brackets. 5 + 3 equals 8. Then multiply 8 × 8 to get 64. This follows the order of operations.
#2. What is 45 ÷ 5?
Explanation: Division means splitting equally. When 45 is divided into 5 equal parts, each part is 9.
#3. What is 9 + 15?
Explanation: Adding 9 and 15 gives a total of 24.
#4. Which number is a multiple of 5?
Explanation: Multiples of 5 end in 0 or 5. Since 30 ends in 0, it is a multiple of 5.
#5. What is the total of the angles in a triangle?
Explanation: In geometry, the sum of all interior angles of any triangle is always 180 degrees.
#6. If a number is divided by 1, what is the result?
Explanation: Dividing any number by 1 does not change its value. This is a basic rule of division.
#7. What is 7 × 6?
Explanation: Multiplication means repeated addition. Adding 7 six times results in 42.
#8. Which number is the largest?
Explanation: When comparing decimals, the number with the highest value is the largest. 0.8 is greater than 0.75, 0.65, and 0.5.
#9. Which fraction is equal to one half?
Explanation: Fractions are equal when they represent the same value. 2 divided by 4 equals 1 divided by 2.
#10. What is the next number in the pattern: 2, 4, 6, 8, ___ ?
Explanation: The pattern increases by 2 each time. After 8, adding 2 gives 10.
#11. Which number is an even number?
Explanation: Even numbers are divisible by 2. Since 34 ÷ 2 equals 17 with no remainder, it is even.
#12. If you buy one item for $5 and another for $7, how much do you spend?
Explanation: Adding the two prices, 5 + 7 equals 12 dollars.
#13. What is 100 − 47?
Explanation: Subtracting 47 from 100 leaves 53. This can be checked by adding 47 and 53 to get 100.
#14. Which unit is best for measuring the length of a pencil?
Explanation: A pencil is small in length, so centimeters are the most appropriate unit of measurement.
#15. What is 60 ÷ 10?
Explanation: Dividing by 10 moves the decimal one place to the left. 60 becomes 6.
#16. What is the value of 3²?
Explanation: Squaring a number means multiplying it by itself. 3 × 3 equals 9.
#17. Which number is an odd number?
Explanation: Odd numbers cannot be divided evenly by 2. Since 25 leaves a remainder, it is odd.
#18. Which shape has exactly three sides?
Explanation: A triangle is defined as a shape with three straight sides and three angles.
#19. What is the perimeter of a square with side length 5 units?
Explanation: A square has four equal sides. Adding 5 + 5 + 5 + 5 gives a perimeter of 20 units.
#20. What is the fraction of a pizza if it is cut into 4 equal parts and you eat one part?
Explanation: When an object is divided into 4 equal parts, each part represents one fourth.
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