Number and Numeration Practice Questions

NECO (Nigeria) · NECO Mathematics · 133 free MCQs with instant results and detailed explanations.

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Sample Questions from Number and Numeration

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Easy

What is the place value of 7 in the number 5,748?

A. 700

B. 70

C. 7

D. 7,000

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Correct Answer: A

In the number 5,748, the digit 7 is in the hundreds place. Therefore, its place value is 7 multiplied by 100, which equals 700.

Easy

Which of the following numbers is the largest?

A. 1,234

B. 1,243

C. 1,223

D. 1,342

Show Answer & Explanation

Correct Answer: D

The number 1,342 is larger than all the other numbers listed, as it has a greater value in the thousands and hundreds places compared to the others.

Easy

What is the place value of the digit 7 in the number 5,782?

A. 70

B. 700

C. 7

D. 7,000

Show Answer & Explanation

Correct Answer: B

In the number 5,782, the digit 7 is in the hundreds place, which represents 700.

Medium

What is the value of 7,843 rounded to the nearest hundred?

A. 7,800

B. 7,840

C. 7,843

D. 7,900

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Correct Answer: B

When rounding to the nearest hundred, we look at the tens place. Since the tens digit is 4, we round down to 7,840.

Medium

If 5x + 3 = 2x + 18, what is the value of x?

A. 5

B. 3

C. 6

D. 4

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Correct Answer: A

To find x, rearrange the equation: 5x - 2x = 18 - 3 leads to 3x = 15, so x = 5.

Medium

A number is increased by 15% and then decreased by 15%. What is the net effect on the original number?

A. Decreased by 2.25%

B. Increased by 15%

C. Decreased by 15%

D. Increased by 0.25%

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Correct Answer: A

Increasing a number by 15% and then decreasing the new value by 15% results in a net decrease of approximately 2.25%.

Medium

What is the least common multiple (LCM) of 12 and 18?

A. 36

B. 24

C. 30

D. 18

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Correct Answer: A

The LCM of two numbers is the smallest number that is a multiple of both. For 12 and 18, the LCM is 36.

Hard

If the product of two consecutive even integers is 288, what are the integers?

A. 16 and 18

B. 12 and 14

C. 14 and 16

D. 10 and 12

Show Answer & Explanation

Correct Answer: C

The two consecutive even integers can be represented as x and x + 2. Therefore, x(x + 2) = 288. Solving the equation gives x = 14, making the integers 14 and 16.

Hard

What is the smallest prime number greater than 50?

A. 53

B. 51

C. 55

D. 57

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Correct Answer: A

The prime numbers greater than 50 are 53, 59, etc., and 53 is the first prime number you encounter after 50.

Q10

Hard

A number is increased by 20% and then decreased by 10%. If the final number is 90, what was the original number?

A. 75

B. 80

C. 85

D. 90

Show Answer & Explanation

Correct Answer: A

Let the original number be x. After a 20% increase, the number becomes 1.2x; after a 10% decrease, it becomes 0.9 * 1.2x = 90. Solving gives x = 75.

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Number and Numeration — NECO (Nigeria) NECO Mathematics Practice Questions Online

This page contains 133 practice MCQs for the chapter Number and Numeration in NECO (Nigeria) NECO Mathematics. The questions are organized by difficulty — 46 easy, 70 medium, 17 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.