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Q.

Is it true that if we round off 183 upwards and 154 downwards, to the nearest hundred, then the product of those two numbers is 20000?


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a

True

b

False  

answer is A.

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Detailed Solution

Rounding off upwards means that the number to be greater than or equal to 5 and then round it off accordingly, whereas rounding off downwards means that the number to be smaller than 5 and then round it off accordingly.
Rounding off 183 upwards is equal to 200.
Rounding off 154 downwards is equal to 100.
Now let us calculate the product of the two numbers,
200×100=20000
Therefore, the product of the two numbers is 20000.
Hence, option 1 is correct, our statement is true.
 
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