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laxieqv
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HIMALAYA
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SunShine
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chuckle
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I too got D with calculation. How do we find the answer without calculation?
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vivek123
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Without calculation :) "D"
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Rocky
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To find answer without calculating...

if the option is even number and any of product prime number is greater than 5 then that option should be eiminated at first sight...


And for odd number eliminate the option where the product prime number is greater than 9
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lhotseface
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D it is.

The product has to be less than 10 and greater than 9....looking at the answer choices. The only possible distinct "allowable" primes are 2,3 since a 5 ruins the plot.



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