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The Number Line topic in Class 9 Mathematics, within Number Systems, helps students visualise numbers as points on a continuous line. They learn to locate and compare integers, rational numbers, irrational numbers and real numbers, understand their order and relative position, and interpret distance using intervals. The topic also supports the geometric representation of irrational numbers such as √2, making the connection between numerical expressions and their positions on the real number line clear.
TOPIC PRACTICE
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Easy · Level 11 · number systems,number line,comparison of numbers,integers,grade 9 mathematicsView options
2
3
5
0
Easy · Level 11 · number systems, number line, integers, negative numbers, comparing numbersView options
-10
-4
Both are equal
0
Easy · Level 11 · number systems, number line, midpoint, arithmetic meanView options
1
2
3
0
Easy · Level 11 · number systems, number line, integers, comparing numbersView options
Easy · Level 11 · number systems, number line, comparing integers, positive numbersView options
0
7
दोनों
-1
Easy · Level 11 · number systems, number line, integers, negative numbersView options
Right
Left
Middle
Above
Easy · Level 11 · number systems, number line, comparing numbers, class 9 mathematicsView options
5
4
7
3
Easy · Level 11 · number systems, number line, integers, comparing numbersView options
-4
0
-1
4
Easy · Level 11 · number systems,number line,integers,comparing numbers,positive and negative numbersView options
-7
2
0
-1
Easy · Level 11 · number systems, number line, comparing numbers, integers, class 9 mathematicsView options
9
10
7
11
Easy · Level 11 · number systems, number line, integers, comparing numbersView options
-15
15
0
1
Easy · Level 11 · number line, midpoint, integers, rational numbers, number systemsView options
0
1
-1
2
Question 1EasyLevel 11
Which number is greater than 3
Correct answer: C
On a number line, numbers to the right of 3 are greater than 3. Among the given options, 5 lies to the right of 3, so it is the correct answer. Option 3 is equal to 3, not greater. Exam tip: on a number line, the number farther to the right is larger.
On a number line, the number farther to the right is greater. Since -4 lies to the right of -10, -4 is greater, so option B is correct. Among negative numbers, the number closer to zero is greater; therefore, -10 is not the correct choice. Exam tip: Compare negative numbers by checking their positions on the number line or their distance from zero.
The midpoint of two numbers a and b is \((a+b)/2\). Here, \((2+2)/2=2\), so the correct answer is 2. When both numbers are the same, their midpoint is that same number; 1 and 3 are nearby but incorrect choices. Exam tip: On a number line, the midpoint is equally distant from both endpoints.
On the number line, the number farther to the right is greater. Since 6 lies to the right of -6, 6 is greater. Thus, the positive number 6 is greater than the negative number -6. Exam tip: When positive and negative numbers have the same magnitude, the positive number is always greater.
On a number line, the number farther to the right is greater. Since 8 lies to the right of 1, 8 is the greater number. Both 0 and -1 are less than 1. Exam tip: numbers increase as we move from left to right on the number line.
Which of the following numbers lies to the left of 0 on the number line?
Correct answer: C
All negative numbers lie to the left of 0 on a number line. Therefore, -4 lies to the left of 0. \(\frac{3}{5}\) and 7 are positive, so they lie to the right of 0, while 0 itself is the origin. Exam tip: values decrease as you move left on a number line.
Negative numbers are located to the left of 0 on the number line, so -5 lies to the left of 0. Remember that moving left on a number line means the numerical value decreases.
On the number line, 10 lies to the right of 2. Numbers increase as we move to the right, so 10 > 2 and 10 is the correct answer. The closest distractor is 2, but it is smaller than 10. Exam tip: For two positive numbers, the number farther to the right on the number line is greater.
On a number line, the number located farther to the right is greater. Since 0 lies to the right of -8, we have 0 > -8, so option B is correct. Zero is greater than every negative number. Exam tip: remember that numbers increase as we move from left to right on the number line.
On a number line, the number located farther to the right is greater. Since 5 lies to the right of -5, 5 is the greater number. The values 0 and -1 are not the given numbers being compared. Exam tip: A positive number is greater than its corresponding negative number.
3 is a positive number, so it lies three units to the right of 0 on the number line. Therefore, option B is correct. Option A is the direction used for negative numbers. Exam tip: positive numbers lie to the right of 0, while negative numbers lie to its left.
The distance between two numbers on a number line is their absolute difference. Therefore, \(|12-0|=12\), so 12 is the correct option. A value such as 11 would result from calculating the difference incorrectly. Exam tip: always use the absolute value of the difference, because distance cannot be negative.
On the number line, 7 lies to the right of 0, so 7 is the greater number. The two numbers are not equal, and 0 is not greater than 7; therefore, option B is correct. Exam tip: on a number line, the number farther to the right is greater.
On a number line, negative numbers are located to the left of 0. Therefore, -1 is exactly one unit to the left of 0. Exam tip: numbers increase as we move right and decrease as we move left on the number line.
On a number line, numbers to the right of 6 are greater than 6. Among the given options, 7 lies to the right of 6, so it is the correct answer. The numbers 5, 4, and 3 are all less than 6. Exam tip: Moving to the right on a number line increases the value of numbers.
On a number line, the number farther to the right is greater. Since 0 lies to the right of -4, 0 is greater. Although -1 is greater than -4, it is still less than 0. Exam tip: Zero is greater than every negative number.
On a number line, the number farther to the right is greater. The number 2 lies to the right of -7, so 2 is greater. Although 0 and -1 are also options, neither is one of the two numbers being compared. Exam tip: Any positive number is greater than any negative number.
On a number line, numbers less than 8 lie to the left of 8. Among the given options, 7 is to the left of 8, so it is the correct answer. The numbers 9, 10, and 11 are greater than 8 and lie to its right. Exam tip: on a number line, a number farther left is smaller and a number farther right is greater.
On a number line, the number farther to the right is greater. Since 15 lies to the right of -15, 15 is greater. Although both numbers are equally far from 0, the positive number 15 is greater than the negative number -15. Exam tip: When comparing a positive and a negative number, the positive number is greater.
The midpoint of two numbers is their average: \(\frac{1+(-1)}{2}=\frac{0}{2}=0\). Therefore, the midpoint of 1 and -1 is 0. The numbers 1 and -1 are the endpoints, not the midpoint. Exam tip: The midpoint of opposite numbers \(a\) and \(-a\) is always 0.
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