A Story of Numbers
CBSE · Class 8 · Mathematics
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Quick Quiz: A Story of Numbers
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A number 3426 is grouped in the Egyptian way. What is its expanded form in powers of 10?
A Mesopotamian number is formed by 10 groups of 60 and 40 extra ones. What number is this?
A Chinese rod numeral has 2 at the 10^3 place, 6 at the 10^2 place, 3 at the 10 place, and 4 at the 1 place. What number is formed?
A Hindu numeral has digits 3, 7, and 5. What is its expanded form?
Sample Questions
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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