In this task, you need to provide the correct option for a given problem from the provided options.
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Question: Problem: find the number of different prime factors of 441 
Options: a ) 4 , b ) 2 , c ) 3 , d ) 5 , e ) 6

Answer: b


Question: Problem: if x and y are both odd prime numbers andx < y , then how many different positive integer factors does 2 xyhave ? 
Options: a ) 3 , b ) 4 , c ) 6 , d ) 12 , e ) 8

Answer: e


Question: Problem: find the number of different prime factors of 6440 
Options: a ) 4 , b ) 2 , c ) 3 , d ) 5 , e ) 6

Answer:
a