Question : Directions: In the following question, which number is wrong in the series? 225, 169, 144, 100, 64, 48
Option 1: 225
Option 2: 144
Option 3: 64
Option 4: 48
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Correct Answer: 48
Solution : Given: 225, 169, 144, 100, 64, 48
The given numbers in the series are the perfect squares of the natural numbers – ⇒ 225 = 15 2 ; 169 = 13 2 ; 144 = 12 2 ; 100 = 10 2 ; 64 = 8 2 ; 48→48 is not a perfect square.
So, 48 is the wrong term for the given series. Hence, the fourth option is correct.
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