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Question

What of the following do we have to add with 280 to make it a perfect square nearest to it? 


Your Answer
A
3
Correct Answer
B
32
Your Answer
C
22
Your Answer
D
1

Solution

The correct option is B 32
100<280<400
102<280<202
So, square closest to 280 will lie between 10 and 20.
Number Square
11 121
12 144
13 169
14 196
15 225
16 256
17 289
18 324
19 361

The smallest perfect square greater than 280 is 289.
So, the number to be added is:
289280=9=32

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