A Story of Numbers — Important Questions
CBSE · Class 8 · Mathematics
113 important questions from A Story of Numbers for CBSE Class 8 Mathematics, with answers. Includes multiple choice and true false questions.
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Important Questions from A Story of Numbers
In the Roman system, 27 is written by grouping first into 10s, then 5s, then 1s. What is the Roman numeral?
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XXVII
27 = 10 + 10 + 5 + 1 + 1, so the Roman numeral is XXVII.
A number is represented on an Egyptian abacus as 3426. How many counters are needed in total if each unit, ten, hundred, and thousand is shown separately?
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15
3426 = 3 thousands + 4 hundreds + 2 tens + 6 ones. Total counters = 3 + 4 + 2 + 6 = 15.
A Mesopotamian number uses the place value 60. If a number has 12 in the 60s place and 8 in the ones place, what is the number?
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728
Compute 12 × 60 + 8 = 720 + 8 = 728.
A number in Chinese rod numerals has 4 in the thousands place, 0 in the hundreds place, 3 in the tens place, and 9 in the ones place. What is the number?
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4039
The digits are placed by position: 4 × 10^3 + 0 × 10^2 + 3 × 10 + 9 = 4039.
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
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