teagan4christ
teagan4christ teagan4christ
  • 23-02-2017
  • Mathematics
contestada

Which number is a prime number?
A. 111
B. 121
C. 131
D. 141

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apologiabiology
apologiabiology apologiabiology
  • 23-02-2017
I know for a fact that 121=11 times 11

hmm
to tell if a number is divisible by 3, add the digits and see if the sum is divisible by 3
well 111 is divisible by 3
141 is also divisible by 3



answer is C
Answer Link
Guerdy
Guerdy Guerdy
  • 23-02-2017
A prime number is a number that have no divisors. 

A. 111 have 3^37
B. 121 have 11^11 
C. 131 have none
D. 141 have 3^47

So you can say that your answer is C. 131
Answer Link

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