# Class 6th: Chapter 1 Knowing Our Numbers

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Practice test for class 6th to practice sample question for the enhancing their knowledge.
Each question consist of one marks
Each question consist of 4 options out of which only one option is correct
you have to choose only one option
for every correct option 1 mark is awarded and there will be no negative marking for wrong options

• 1.

### What is the even prime number?

• A.

2

• B.

3

• C.

1

• D.

None of the above

A. 2
Explanation
The only even prime number is 2. This is because a prime number is defined as a number greater than 1 that has no positive divisors other than 1 and itself. While all other even numbers can be divided by 2, making them not prime, 2 can only be divided by 1 and 2, making it the only even prime number.

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• 2.

### Sum 3537 + 3884 to nearest tens is

• A.

1000

• B.

7400

• C.

7420

• D.

7440

C. 7420
Explanation
To find the sum of 3537 and 3884 to the nearest tens, we round each number to the nearest tens and then add them together. Rounding 3537 to the nearest tens gives us 3540, and rounding 3884 to the nearest tens gives us 3880. Adding these rounded numbers together gives us 7420, which is the nearest tens value for the sum of 3537 + 3884.

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• 3.

### 1 billion = ______ million

• A.

10

• B.

100

• C.

1000

• D.

10000

C. 1000
Explanation
One billion is equal to 1000 million. This is because when we multiply 1000 by 1000, we get 1 million. Therefore, if we multiply 1000 million by 1000, we get 1 billion.

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• 4.

### 15 × 1000 + 7 × _______ + 6 × 10 = 15760

• A.

1

• B.

10

• C.

100

• D.

1000

C. 100
Explanation
To solve the equation, we can substitute the given values into the equation and solve for the missing value. By substituting 100 for the missing value, we get 15 * 1000 + 7 * 100 + 6 * 10 = 15760. Simplifying the equation, we get 15000 + 700 + 60 = 15760. Combining like terms, we get 15760 = 15760, which is a true statement. Therefore, the missing value must be 100.

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• 5.

### Estimated value of 467 to nearest thousand is

• A.

Zero

• B.

400

• C.

470

• D.

1000

A. Zero
Explanation
The estimated value of 467 to the nearest thousand is zero because when rounding to the nearest thousand, any number below 500 will be rounded down to zero. In this case, 467 is less than 500, so it gets rounded down to zero.

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• 6.

### Roman Numeral of 400 is

• A.

CD

• B.

CL

• C.

LD

• D.

XC

A. CD
Explanation
The Roman numeral for 400 is CD. In Roman numerals, C represents 100 and D represents 500. When a smaller numeral (C) is placed before a larger numeral (D), it indicates subtraction. So, CD represents 500-100=400.

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• 7.

### Sum of 178 and 69 to nearest hundred is

• A.

100

• B.

200

• C.

250

• D.

300

B. 200
Explanation
When you round the sum of 178 and 69 to the nearest hundred, you look at the last two digits, which are 78. Since 78 is closer to 100 than it is to 200, you round it down to 100. Therefore, the sum of 178 and 69 rounded to the nearest hundred is 200.

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• 8.

### Estimated the value of the product of 108 and 12.

• A.

1000

• B.

1500

• C.

1700

• D.

2000

A. 1000
Explanation
The product of 108 and 12 can be estimated by rounding both numbers to the nearest ten. 108 rounds to 110 and 12 rounds to 10. Multiplying these rounded numbers gives us an estimate of 1100. However, since we rounded up for both numbers, the actual product will be slightly less than 1100. The closest option is 1000, which is the correct answer.

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• 9.

### 1 million = ______ thousands

• A.

10

• B.

100

• C.

1000

• D.

10000

C. 1000
Explanation
The correct answer is 1000 because there are 1000 thousands in one million.

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• 10.

### 2 × 10000 + 6 × 1000 = ?

• A.

20000

• B.

16000

• C.

2600

• D.

26000

D. 26000
Explanation
The given expression is 2 multiplied by 10000 plus 6 multiplied by 1000. When we simplify this expression, we get 20000 plus 6000, which equals 26000. Therefore, the correct answer is 26000.

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• 11.

### In the International system of numeration, one crore is equal to ______ million.

• A.

1

• B.

10

• C.

100

• D.

1000

B. 10
Explanation
In the International system of numeration, one crore is equal to ten million. This is because one crore is equal to ten million in the Indian numbering system, which is used in countries like India, Pakistan, and Bangladesh. In this system, one crore is equivalent to ten million, so the correct answer is 10.

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• 12.

### The sum of 267 + 132 to the nearest ten is _______.

• A.

300

• B.

200

• C.

350

• D.

400

D. 400
Explanation
To find the sum of 267 + 132 to the nearest ten, we first add the two numbers which gives us 399. Since 399 is closer to 400 than to any other multiple of ten, the sum rounded to the nearest ten is 400.

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• 13.

### Find the smallest number among the following numbers. 1411, 14504, 2431, 10001, 9900

• A.

10001

• B.

9900

• C.

2431

• D.

1411

D. 1411
Explanation
The given question asks to find the smallest number among the given numbers. The numbers are 1411, 14504, 2431, 10001, and 9900. The smallest number among these numbers is 1411.

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• 14.

### The tickets sold for the semi-final IPL match were 9872, whereas 10050 tickets were sold during the finals. How many more tickets, estimated to the nearest tens, were sold during the finals?

• A.

160

• B.

170

• C.

180

• D.

190

C. 180
Explanation
During the finals, 10050 tickets were sold, whereas for the semi-final match, only 9872 tickets were sold. To find out how many more tickets were sold during the finals, we subtract the number of tickets sold for the semi-finals from the number of tickets sold during the finals. Therefore, 10050 - 9872 = 178. Since we need to estimate to the nearest tens, the answer would be 180.

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• 15.

### The biggest 4 digit number formed by using each of the digits 5,7,8,9, without repetition is

• A.

9875

• B.

8975

• C.

7589

• D.

5789

A. 9875
Explanation
The question asks for the biggest 4-digit number that can be formed using the digits 5, 7, 8, and 9 without repetition. The given answer, 9875, is indeed the largest possible number that can be formed using these digits without repetition.

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• 16.

### Rita has a ribbon of length 2070 mm. Sita has a ribbon whose length is 1232 mm shorter than Rita's ribbon. What is the approximate length of Sita's ribbon when rounded to the nearest hundred (in millimeters)?

• A.

500

• B.

1000

• C.

800

• D.

2000

C. 800
Explanation
To find the approximate length of Sita's ribbon, we need to subtract 1232 mm from Rita's ribbon length and then round the result to the nearest hundred.
Rita's ribbon length = 2070 mm Sita's ribbon length = Rita's ribbon length - 1232 mm
Sita's ribbon length ≈ 2070 mm - 1232 mm Sita's ribbon length ≈ 838 mm
When rounded to the nearest hundred, Sita's ribbon length is approximately 800 mm.

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• 17.

### LXIX =

• A.

49

• B.

59

• C.

69

• D.

79

C. 69
Explanation
The Roman numeral "LXIX" represents the number 69. In Roman numerals, "L" stands for 50, "X" stands for 10, and "IX" stands for 9. Adding these values together gives us 50 + 10 + 9 = 69.

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• 18.

### The number 235,006 can be written in words in the international system of numeration as

• A.

Two lakh thirty five thousand six

• B.

Two hundred thirty five thousand six

• C.

Twenty three lakh thirty five thousand six

• D.

Twenty three thousand five hundred and six

B. Two hundred thirty five thousand six
Explanation
The correct answer is "Two hundred thirty five thousand six" because it accurately represents the number 235,006 in words. The number is composed of 200,000 (two hundred thousand), 30,000 (thirty thousand), and 6 (six), which are all correctly written in words.

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• 19.

### Smallest 5-digit number exceeds the largest 4-digit number by _______ .

• A.

999

• B.

998

• C.

1000

• D.

1

D. 1
Explanation
The smallest 5-digit number is 10000, and the largest 4-digit number is 9999. When we subtract the largest 4-digit number from the smallest 5-digit number, we get 1.

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• 20.

### Simplify: 5 ×(14 - 20).

• A.

30

• B.

40

• C.

-30

• D.

-40

C. -30
Explanation
The expression 5 times the quantity of 14 minus 20 simplifies to 5 times -6, which equals -30.

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Janaisa Harris |BA (Mathematics) |
Mathematics
Ms. Janaisa Harris, an experienced educator, has devoted 4 years to teaching high school math and 6 years to tutoring. She holds a bachelor's degree in Mathematics (Secondary Education, and Teaching) from the University of North Carolina at Greensboro and is currently employed at Wilson County School (NC) as a mathematics teacher. She is now broadening her educational impact by engaging in curriculum mapping for her county. This endeavor enriches her understanding of educational strategies and their implementation. With a strong commitment to quality education, she actively participates in the review process of educational quizzes, ensuring accuracy and relevance to the curriculum.

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• Jun 14, 2024
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• Jul 04, 2020
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