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All questions of Number Sense (7 and 8 digit numbers) for Class 5 Exam
What is the place value of 5 in 45,23,678?- a)50,000
- b)5,00,000
- c)5,000
- d)5,00,00,000
Correct answer is option 'B'. Can you explain this answer?
What is the place value of 5 in 45,23,678?
a)
50,000
b)
5,00,000
c)
5,000
d)
5,00,00,000
|
Hrishikesh Chavan answered |
Understanding Place Value
Place value is the value of a digit based on its position in a number. In the number 45,23,678, each digit has a specific place value based on its location.
Breaking Down the Number
- The number 45,23,678 can be separated as follows:
- 4 in the crore place
- 5 in the lakh place
- 2 in the ten thousand place
- 3 in the thousand place
- 6 in the hundred place
- 7 in the ten place
- 8 in the unit place
Identifying the Place Value of 5
- The digit 5 is located in the lakh place:
- This means the value of 5 is 5 times 1,00,000.
Calculating the Value
- Therefore, the place value of 5 in 45,23,678 is:
- 5 x 1,00,000 = 5,00,000
Conclusion
- The correct answer is option 'B' (5,00,000), which represents the place value of the digit 5 in the given number.
Understanding place value is crucial as it helps in comprehending larger numbers and performing arithmetic operations effectively.
Place value is the value of a digit based on its position in a number. In the number 45,23,678, each digit has a specific place value based on its location.
Breaking Down the Number
- The number 45,23,678 can be separated as follows:
- 4 in the crore place
- 5 in the lakh place
- 2 in the ten thousand place
- 3 in the thousand place
- 6 in the hundred place
- 7 in the ten place
- 8 in the unit place
Identifying the Place Value of 5
- The digit 5 is located in the lakh place:
- This means the value of 5 is 5 times 1,00,000.
Calculating the Value
- Therefore, the place value of 5 in 45,23,678 is:
- 5 x 1,00,000 = 5,00,000
Conclusion
- The correct answer is option 'B' (5,00,000), which represents the place value of the digit 5 in the given number.
Understanding place value is crucial as it helps in comprehending larger numbers and performing arithmetic operations effectively.
Which is the smallest 7-digit number?- a)1,000,000
- b)999,999
- c)10,00,000
- d)9,99,999
Correct answer is option 'C'. Can you explain this answer?
Which is the smallest 7-digit number?
a)
1,000,000
b)
999,999
c)
10,00,000
d)
9,99,999
|
Muskaan Reddy answered |
Understanding 7-Digit Numbers
To identify the smallest 7-digit number, we first need to understand what constitutes a 7-digit number. A 7-digit number has exactly seven digits, ranging from 1 to 9 for the first digit, and 0 to 9 for the remaining six digits.
Definition of a 7-Digit Number
- The first digit cannot be zero.
- The smallest digit it can start with is 1.
Evaluating the Options
Let’s analyze the options provided:
- a) 1,000,000:
- This is a 7-digit number. It starts with 1 and is the first number in the 7-digit range.
- b) 999,999:
- This is a 6-digit number because it only has six digits. So, it cannot be the smallest 7-digit number.
- c) 10,00,000:
- This appears to be a formatting error. In standard notation, it should be written as 1,000,000, which is again the smallest 7-digit number.
- d) 9,99,999:
- This also represents a 6-digit number, as it has only six digits.
Conclusion
Among the options, the correct answer is a) 1,000,000, which is indeed the smallest 7-digit number.
Therefore, the correct choice should be option a, not c. Always remember that the smallest number in any digit category is determined by its leading digits!
To identify the smallest 7-digit number, we first need to understand what constitutes a 7-digit number. A 7-digit number has exactly seven digits, ranging from 1 to 9 for the first digit, and 0 to 9 for the remaining six digits.
Definition of a 7-Digit Number
- The first digit cannot be zero.
- The smallest digit it can start with is 1.
Evaluating the Options
Let’s analyze the options provided:
- a) 1,000,000:
- This is a 7-digit number. It starts with 1 and is the first number in the 7-digit range.
- b) 999,999:
- This is a 6-digit number because it only has six digits. So, it cannot be the smallest 7-digit number.
- c) 10,00,000:
- This appears to be a formatting error. In standard notation, it should be written as 1,000,000, which is again the smallest 7-digit number.
- d) 9,99,999:
- This also represents a 6-digit number, as it has only six digits.
Conclusion
Among the options, the correct answer is a) 1,000,000, which is indeed the smallest 7-digit number.
Therefore, the correct choice should be option a, not c. Always remember that the smallest number in any digit category is determined by its leading digits!
Which is the largest 8-digit number?- a)99,99,999
- b)1,00,00,000
- c)9,99,99,999
- d)99,99,99,999
Correct answer is option 'C'. Can you explain this answer?
Which is the largest 8-digit number?
a)
99,99,999
b)
1,00,00,000
c)
9,99,99,999
d)
99,99,99,999
|
Rohini Seth answered |
The largest 8-digit number has all digits as 9. That number is 9,99,99,999.
Arrange in ascending order: 2,34,56,789; 23,45,678; 9,87,65,432; 1,23,45,678- a)23,45,678; 1,23,45,678; 2,34,56,789; 9,87,65,432
- b)9,87,65,432; 2,34,56,789; 1,23,45,678; 23,45,678
- c)2,34,56,789; 23,45,678; 1,23,45,678; 9,87,65,432
- d)1,23,45,678; 23,45,678; 2,34,56,789; 9,87,65,432
Correct answer is option 'A'. Can you explain this answer?
Arrange in ascending order: 2,34,56,789; 23,45,678; 9,87,65,432; 1,23,45,678
a)
23,45,678; 1,23,45,678; 2,34,56,789; 9,87,65,432
b)
9,87,65,432; 2,34,56,789; 1,23,45,678; 23,45,678
c)
2,34,56,789; 23,45,678; 1,23,45,678; 9,87,65,432
d)
1,23,45,678; 23,45,678; 2,34,56,789; 9,87,65,432
|
Stoneridge Institute answered |
Arrange from smallest to largest:
23,45,678 (8-digit but smallest), then 1,23,45,678, then 2,34,56,789, and finally 9,87,65,432.
23,45,678 (8-digit but smallest), then 1,23,45,678, then 2,34,56,789, and finally 9,87,65,432.
How many lakhs are there in 5,00,00,000?- a)5
- b)50
- c)500
- d)5000
Correct answer is option 'C'. Can you explain this answer?
How many lakhs are there in 5,00,00,000?
a)
5
b)
50
c)
500
d)
5000
|
|
Rohini Seth answered |
1 lakh = 1,00,000. To find number of lakhs in 5,00,00,000:
5,00,00,000 ÷ 1,00,000 = 500 lakhs.
5,00,00,000 ÷ 1,00,000 = 500 lakhs.
Which is the smallest 8-digit number that ends with 5?- a)1,00,00,005
- b)1,00,00,015
- c)1,00,00,025
- d)1,00,00,055
Correct answer is option 'A'. Can you explain this answer?
Which is the smallest 8-digit number that ends with 5?
a)
1,00,00,005
b)
1,00,00,015
c)
1,00,00,025
d)
1,00,00,055
|
Glitz Classes answered |
The smallest 8-digit number is 1,00,00,000. The first number after it that ends in 5 is 1,00,00,005.
What is the largest 7-digit number?- a)99,99,999
- b)9,99,999
- c)9,99,99,999
- d)1,00,00,000
Correct answer is option 'A'. Can you explain this answer?
What is the largest 7-digit number?
a)
99,99,999
b)
9,99,999
c)
9,99,99,999
d)
1,00,00,000
|
|
Rohini Seth answered |
The largest 7-digit number has all digits as 9. That number is 99,99,999.
What is the difference between the smallest 8-digit number and the largest 7-digit number?- a)1
- b)10
- c)100
- d)1000
Correct answer is option 'A'. Can you explain this answer?
What is the difference between the smallest 8-digit number and the largest 7-digit number?
a)
1
b)
10
c)
100
d)
1000
|
Gunjan Lakhani answered |
Smallest 8-digit number = 1,00,00,000. Largest 7-digit number = 99,99,999. Difference = 1,00,00,000 – 99,99,999 = 1.
Which of these numbers has 7 in the crore place?- a)7,23,45,678
- b)72,34,56,78
- c)70,23,45,678
- d)5,72,34,678
Correct answer is option 'A'. Can you explain this answer?
Which of these numbers has 7 in the crore place?
a)
7,23,45,678
b)
72,34,56,78
c)
70,23,45,678
d)
5,72,34,678
|
Edu Impact answered |
In 7,23,45,678, the first digit 7 is in the crore place.
Write 6,40,52,308 in expanded form.- a)6,00,00,000 + 40,00,000 + 52,000 + 300 + 8
- b)6,00,00,000 + 40,00,000 + 50,000 + 2,000 + 300 + 8
- c)6,00,00,000 + 40,00,000 + 5,000 + 200 + 300 + 8
- d)6,00,00,000 + 40,00,000 + 2,00,000 + 3,000 + 8
Correct answer is option 'B'. Can you explain this answer?
Write 6,40,52,308 in expanded form.
a)
6,00,00,000 + 40,00,000 + 52,000 + 300 + 8
b)
6,00,00,000 + 40,00,000 + 50,000 + 2,000 + 300 + 8
c)
6,00,00,000 + 40,00,000 + 5,000 + 200 + 300 + 8
d)
6,00,00,000 + 40,00,000 + 2,00,000 + 3,000 + 8
|
|
Rohini Seth answered |
Break the digits:
6 crores = 6,00,00,000
40 lakhs = 40,00,000
5 ten-thousands = 50,000
2 thousands = 2,000
3 hundreds = 300
8 ones = 8
Expanded = 6,00,00,000 + 40,00,000 + 50,000 + 2,000 + 300 + 8.
6 crores = 6,00,00,000
40 lakhs = 40,00,000
5 ten-thousands = 50,000
2 thousands = 2,000
3 hundreds = 300
8 ones = 8
Expanded = 6,00,00,000 + 40,00,000 + 50,000 + 2,000 + 300 + 8.
Write the numeral for “Four crore, five lakh, seventy-two thousand, one hundred thirty-six”.- a)4,05,72,136
- b)40,57,21,36
- c)4,00,05,72,136
- d)45,72,136
Correct answer is option 'A'. Can you explain this answer?
Write the numeral for “Four crore, five lakh, seventy-two thousand, one hundred thirty-six”.
a)
4,05,72,136
b)
40,57,21,36
c)
4,00,05,72,136
d)
45,72,136
|
|
Rohini Seth answered |
Break the words:
Four crore = 4,00,00,000
Five lakh = 5,00,000
Seventy-two thousand = 72,000
One hundred thirty-six = 136
Together = 4,05,72,136.
Four crore = 4,00,00,000
Five lakh = 5,00,000
Seventy-two thousand = 72,000
One hundred thirty-six = 136
Together = 4,05,72,136.
Which of the following numbers is written correctly in the Indian place value system?- a)12345678
- b)1,23,45,678
- c)12,34,56,78
- d)123,45,678
Correct answer is option 'B'. Can you explain this answer?
Which of the following numbers is written correctly in the Indian place value system?
a)
12345678
b)
1,23,45,678
c)
12,34,56,78
d)
123,45,678
|
|
Gunjan Lakhani answered |
In the Indian system, commas are placed after the first three digits from the right and then every two digits. So the correct form is 1,23,45,678.
Write the numeral for “Seven crore, twelve lakh, fifty-six thousand, three hundred twenty-one”.- a)7,12,56,321
- b)71,25,6321
- c)7,01,25,6321
- d)70,12,56,321
Correct answer is option 'A'. Can you explain this answer?
Write the numeral for “Seven crore, twelve lakh, fifty-six thousand, three hundred twenty-one”.
a)
7,12,56,321
b)
71,25,6321
c)
7,01,25,6321
d)
70,12,56,321
|
|
Stoneridge Institute answered |
Break the words:
Seven crore = 7,00,00,000
Twelve lakh = 12,00,000
Fifty-six thousand = 56,000
Three hundred twenty-one = 321
Adding: 7,00,00,000 + 12,00,000 + 56,000 + 321 = 7,12,56,321.
Seven crore = 7,00,00,000
Twelve lakh = 12,00,000
Fifty-six thousand = 56,000
Three hundred twenty-one = 321
Adding: 7,00,00,000 + 12,00,000 + 56,000 + 321 = 7,12,56,321.
What is the face value of 9 in 89,76,543?- a)90,00,000
- b)9,00,000
- c)9
- d)90,000
Correct answer is option 'C'. Can you explain this answer?
What is the face value of 9 in 89,76,543?
a)
90,00,000
b)
9,00,000
c)
9
d)
90,000
|
|
Edu Impact answered |
Face value is the digit itself, irrespective of its place. The digit is 9, so the face value is 9.
What is the predecessor of 80,00,000?- a)79,99,999
- b)80,00,001
- c)81,00,000
- d)79,00,000
Correct answer is option 'A'. Can you explain this answer?
What is the predecessor of 80,00,000?
a)
79,99,999
b)
80,00,001
c)
81,00,000
d)
79,00,000
|
|
Gunjan Lakhani answered |
The predecessor is one less than the number. 80,00,000 – 1 = 79,99,999.
What is the place value of 4 in 3,42,18,765?- a)4
- b)40,00,000
- c)4,00,000
- d)40,000
Correct answer is option 'B'. Can you explain this answer?
What is the place value of 4 in 3,42,18,765?
a)
4
b)
40,00,000
c)
4,00,000
d)
40,000
|
|
Gunjan Lakhani answered |
In 3,42,18,765, the digit 4 is in the ten lakhs place. Place value = 4 × 10,00,000 = 40,00,000.
What is the successor of 7,65,43,219?- a)7,65,43,218
- b)7,65,43,220
- c)7,65,43,229
- d)7,65,44,000
Correct answer is option 'B'. Can you explain this answer?
What is the successor of 7,65,43,219?
a)
7,65,43,218
b)
7,65,43,220
c)
7,65,43,229
d)
7,65,44,000
|
|
Gunjan Lakhani answered |
The successor is one more than the number. 7,65,43,219 + 1 = 7,65,43,220.
What comes just after 99,99,999?- a)1,00,00,000
- b)99,99,998
- c)10,00,000
- d)9,99,999
Correct answer is option 'A'. Can you explain this answer?
What comes just after 99,99,999?
a)
1,00,00,000
b)
99,99,998
c)
10,00,000
d)
9,99,999
|
|
Rohini Seth answered |
The number after 99,99,999 is 99,99,999 + 1 = 1,00,00,000 (one crore).
Which number is greater: 5,67,89,234 or 5,76,89,234?- a)5,67,89,234
- b)5,76,89,234
- c)Both are equal
- d)Cannot say
Correct answer is option 'B'. Can you explain this answer?
Which number is greater: 5,67,89,234 or 5,76,89,234?
a)
5,67,89,234
b)
5,76,89,234
c)
Both are equal
d)
Cannot say
|
|
Edu Impact answered |
Compare digit by digit from the left. Crore digits are same (5), ten lakh digits are different (6 vs 7). Since 7 > 6, 5,76,89,234 is greater.
Which digit is in the lakhs place in 4,56,78,901?- a)5
- b)6
- c)7
- d)8
Correct answer is option 'B'. Can you explain this answer?
Which digit is in the lakhs place in 4,56,78,901?
a)
5
b)
6
c)
7
d)
8
|
|
Edu Impact answered |
In 4,56,78,901, the lakhs place is the third digit from the left (after crores and ten lakhs). That digit is 6.
Chapter doubts & questions for Number Sense (7 and 8 digit numbers) - Math Olympiad for Class 5 2025 is part of Class 5 exam preparation. The chapters have been prepared according to the Class 5 exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for Class 5 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.
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Math Olympiad for Class 5
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