Question : Directions: In the following question, find the odd number from the given alternatives.
Option 1: 42
Option 2: 84
Option 3: 91
Option 4: 71
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Correct Answer: 71
Solution :
Let's check the options –
First option:
42; 42 is divisible by 1, 2, 3, 6, 7, 14, 21, 42. It is not a prime number.
Second option:
84; 84 is divisible by 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84. It is not a prime number.
Third option:
91; 91 is divisible by 1, 7, 13, 91. It is not a prime number.
Fourth option:
71; 71 is divisible by only 1 and 71. It is a prime number.
The fourth option does not follow a similar pattern as the other options. Hence, the fourth option is correct.
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