Question : Directions: In the following question, find the odd number from the given alternatives.
Option 1: 145
Option 2: 463
Option 3: 581
Option 4: 651
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Correct Answer: 463
Solution :
Let's check each option –
First option:
145 is divisible by 1, 5, 29, 145. So, it is not a prime number.
Second option:
463 is divisible by only 1 and 463. The number of factors of 463 is two. So, it is a prime number.
Third option:
581 is divisible by 1, 7, 83, 581. So, it is not a prime number.
Fourth option:
651 is divisible by 1, 3, 7, 21, 31, 93, 217, 651. So, it is not a prime number.
Hence, the second option is correct.
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