Evaluate:(218)2 – (217)2 – InterviewSolution

1.

Evaluate:(218)2 – (217)2

Answer»

Given (218)² – (217)²

According to the property 8 i.e. for every natural number n, we have [(n+1)²-n²] = [(n+1) + n]

Here n = 217 By applying the above property we get,

=(218)² – (217)²

= (217+1) + 217

= 218 + 217

= 435

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