Fitting door numbers on houses 1-100 how many number 9s would I need
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20 number 9's would I need
Given:
Fitting door numbers on houses 1-100
To find:
How many number 9's would I need.
Explanation:
From 1 to 10 we can write 9.
From 11 to 20 we can write 9 one times that is 19.
From 21 to 30 we can write 9 one times that is 29.
Similar way up to 89 we can write 9 times.
Next 90,91,92,93,94,95,96,97,98,99,100
Here 9 comes 11 times.
Total = 11 + 9 = 20
To learn more...
1)HOW MANY 9 IN 1 TO 100?
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2)A car covers a distance of 175.5 km in 13 litres of petrol. How much distance would it cover in 20 litres of petrol ?
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fitting door numbers on houses 1-100
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