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42
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There is a number between 30 and 60. It is a prime number. The digit in the ones place is three less than the digit in the tens place. What is the number?

 Mar 9, 2021
 #1
avatar+391 
0

If it is prime, that means that last number has to be odd. this leaves us with 5 digits for the last one: 1,3,5,7, and 9. but becayse the digit in the units place is 3 less than the digit in the tens place that has to be 3,4, or 5, we have only 1 answer: $\boxed{41}$

 Mar 9, 2021
 #2
avatar+282 
+1

I believe you've posted this questions already: https://web2.0calc.com/questions/whattt_6

 

The answer would be 41.

 

Hope this helped!

Caffeine :)

 Mar 9, 2021
edited by Caffeine  Mar 9, 2021

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