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Q.

How many numbers lie between the square of the 85 and 86?


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a

170

b

180

c

190

d

200 

answer is A.

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Detailed Solution

It is required to find the total numbers that lie between the square of the 85 and 86.
We are aware that between the squares of the numbers n and (n+1), there are 2n non-square numbers.
Calculate the result, since there are 2n non-square numbers lying between the squares of the numbers n and (n+1).
Here, n = 85.
Hence the total numbers that lie between square of the 85 and 86 is,
⇒2×85 ⇒170  
Hence, the numbers lie between squares of the 85 and 86 = 170.
Therefore, option 1 is correct.
 
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How many numbers lie between the square of the 85 and 86?