Quant Question Of The Day: 231
For how many integers
- 1
- 2
- 0
- infinite many
For how many integers
Anwer: (1) 2 Solution: factorize the expression (m-3)(m-4) for the above expression to be prime one of the factors should be 1 or -1 when m-3 = 1 or -1 , then m = 4 or 2 4 doesn’t give prime, 2 will make the value of expression = 2, which is prime when m-4 = 1 or -1 , then m= 5 or 3, 5 will make expression = 2 Hence for values =2 and 5, this expression will be prime.
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What about m=2?