Consolidating numbers up to 8 digits Quiz - ICSE Class 6 Mathematics
Free practice quiz: Consolidating numbers up to 8 digits (ICSE Class 6 Mathematics). 38 multiple-choice questions with answers and explanations. Play online, no sign-up needed.
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What is the largest 8-digit number that can be formed using the digits 1, 0, 9, 8, 7, 6, 5, and 4, without repetition?
- 98,765,410
- 98,765,401
- 98,765,014
- 10,456,789
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Answer: A. 98,765,410
To form the largest number, we arrange the given digits in descending order. The digits are 9, 8, 7, 6, 5, 4, 1, 0. Arranging them in descending order gives 98765410.
What is the smallest 8-digit number that can be formed using the digits 5, 0, 2, 8, 1, 4, 9, and 7, without repetition?
- 1,02,45,789
- 1,02,45,798
- 1,20,45,789
- 0,12,45,789
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Answer: A. 1,02,45,789
To form the smallest 8-digit number, we arrange the digits in ascending order. However, the first digit cannot be zero. The digits are 0, 1, 2, 4, 5, 7, 8, 9. Arranging them in ascending order with the smallest non-zero digit first is 1, followed by the remaining digits in ascending order: 0, 2, 4, 5, 7, 8, 9. This gives 1,02,45,789.
What is the sum of the largest 6-digit number and the smallest 6-digit number?
- 10,09,999
- 1,10,999
- 11,09,999
- 1,01,00,000
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Answer: C. 11,09,999
The largest 6-digit number is 9,99,999. The smallest 6-digit number is 1,00,000. Their sum is 9,99,999 + 1,00,000 = 10,99,999, which is written as 11,09,999.
What is the expanded form of 5,00,00,000?
- 5 * 10^6
- 5 * 10^7
- 5 * 10^8
- 5 * 10^5
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Answer: B. 5 * 10^7
The number 5,00,00,000 is five crore. In terms of powers of 10, this is 5 multiplied by 10 raised to the power of 7, because there are 7 zeros after the 5. So, it is 5 * 10^7.
How many crores are there in 5,00,00,000?
- 5
- 50
- 500
- 0.5
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Answer: A. 5
One crore is 1,00,00,000. So, 5,00,00,000 contains 5 crores (5 * 1,00,00,000).