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Numbers and Number Sense Practice Questions

K-12 (Philippines) · K-12 Mathematics · 130 free MCQs with instant results and detailed explanations.

130
Total
44
Easy
64
Medium
22
Hard

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Sample Questions from Numbers and Number Sense

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Q1
Easy
What is the sum of the first five prime numbers?
A. 28
B. 30
C. 25
D. 18
Show Answer & Explanation
Correct Answer: A
The first five prime numbers are 2, 3, 5, 7, and 11. Their sum is 2 + 3 + 5 + 7 + 11 = 28.
Q2
Easy
If a rectangle has a length of 10 units and a width of 5 units, what is its area?
A. 50 square units
B. 30 square units
C. 25 square units
D. 15 square units
Show Answer & Explanation
Correct Answer: A
The area of a rectangle is calculated by multiplying the length by the width. Therefore, Area = 10 * 5 = 50 square units.
Q3
Easy
What is the value of the expression 5 + 3 × 2?
A. 16
B. 11
C. 10
D. 8
Show Answer & Explanation
Correct Answer: B
According to the order of operations, multiplication comes before addition. Thus, 3 × 2 equals 6, and then adding 5 gives 5 + 6 = 11.
Q4
Medium
If a rectangle has a length of 10 cm and a width of 4 cm, what is its area?
A. 20 cm²
B. 30 cm²
C. 40 cm²
D. 50 cm²
Show Answer & Explanation
Correct Answer: C
The area of a rectangle is calculated by multiplying length by width: 10 cm * 4 cm = 40 cm².
Q5
Medium
What is the value of 3/4 + 2/5?
A. 23/20
B. 1/2
C. 1/4
D. 19/20
Show Answer & Explanation
Correct Answer: A
To add fractions, find a common denominator (20) and calculate: 15/20 + 8/20 = 23/20.
Q6
Medium
If 5x = 40, what is the value of x?
A. 5
B. 8
C. 10
D. 15
Show Answer & Explanation
Correct Answer: B
To solve for x, divide both sides of the equation by 5: 5x = 40 leads to x = 40/5 = 8.
Q7
Medium
If you have a rectangle with a length of 8 cm and a width of 5 cm, what is its area?
A. 40 cm²
B. 30 cm²
C. 50 cm²
D. 20 cm²
Show Answer & Explanation
Correct Answer: A
The area of a rectangle is calculated by multiplying the length by the width. Here, 8 cm * 5 cm = 40 cm².
Q8
Hard
If a number is divided by 7, the remainder is 3. What is the possible value of this number?
A. 25
B. 31
C. 44
D. 47
Show Answer & Explanation
Correct Answer: B
When 31 is divided by 7, the remainder is 3, satisfying the condition given in the question.
Q9
Hard
If the sum of three consecutive integers is 72, what is the middle integer?
A. 23
B. 24
C. 25
D. 26
Show Answer & Explanation
Correct Answer: B
The middle integer can be found by dividing the total sum by 3, which gives 72 / 3 = 24. Therefore, the middle integer is 24.
Q10
Hard
If the product of three consecutive integers is 120, what are the integers?
A. 4, 5, 6
B. 3, 4, 5
C. 5, 6, 7
D. 2, 3, 4
Show Answer & Explanation
Correct Answer: B
The integers 3, 4, and 5 multiply together to give 60, which does not match. The integers 4, 5, and 6 multiply to 120, making them the correct answer.

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Numbers and Number Sense — K-12 (Philippines) K-12 Mathematics Practice Questions Online

This page contains 130 practice MCQs for the chapter Numbers and Number Sense in K-12 (Philippines) K-12 Mathematics. The questions are organized by difficulty — 44 easy, 64 medium, 22 hard — so you can choose the right level for your preparation.

Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit.