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  3. The smallest natural number which when added to the difference of squares of 17 and 13 gives a perfect square is

. The smallest natural number which when added to the difference of squares of 17 and 13 gives a perfect square is

a. 1

b. 5

c. 11

d. 24

Best Answer

Sol: (a)       

172 – 132 = 289 – 169 = 120

120 + 1 = 121 = 112.

So we have to add 1 in 120 to make it complete square.

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