find the odd one out from the options :289,1331,2197,343
Answers
Given :- Find the odd one out from the options.(ਭਿੰਨ ਵਿਕਲਪ ਚੁਣੋ)
A) 289
B) 1331
C) 2197
D) 343
Solution :-
checking all options one by one we get,
A) 289
→ 289 = 17 * 17 = 17²
B) 1331
→ 1331 = 11 * 11 * 11 = 11³
C) 2197
→ 2197 = 13 * 13 * 13 = 13³
D) 343
→ 343 = 7 * 7 * 7 = 7³ .
as we can see that, B , C and D are cubes of prime numbers but A is square of a prime number .
Therefore, we can conclude that (A) 289 is odd one out from the given option .
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Given : 289 , 1331 , 2197 , 343
To Find : odd one out
Solution:
289 = 17²
1331 = 11³
2197 = 13³
343 = 7³
Except 289 all other terms are perfect cube
Hence 289 is odd one out
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