Answer: (4)
Let us consider 145 as 144 + 1
145 = 144 +1
145 = (12)2 + 1
similarly
197 = 196 + 1
197 = (14)2 + 1
325 = 324 + 1
325 = (18)2 + 1
But
399 = 400 – 1
399 = (20)2 -1
Answer: (4)
Let us consider 145 as 144 + 1
145 = 144 +1
145 = (12)2 + 1
similarly
197 = 196 + 1
197 = (14)2 + 1
325 = 324 + 1
325 = (18)2 + 1
But
399 = 400 – 1
399 = (20)2 -1
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