So we can start with the full of possibilities and eliminate them one by one.
The full set is {0,1,2,3,4,5,6,7,8,9}.
Now we know that any prime greater than 2 is odd as otherwise it would have 2 as a factor, so we can eliminate all of these digits that would be an even number, leaving:
{1,3,5,7,9}
We also know that any prime greater than 5 cannot be a multiple of 5 and that all numbers with 5 in the digits are a multiple of 5, so we can eliminate 5.
{1,3,7,9}
We know that 11,13,17 and 19 are all primes, so we cannot eliminate any more of these, leaving the set:
{1,3,7,9} as our answer.
Answer:
Step-by-step explanation:
There are no values of X that equation true .
The sale on Friday = x = 6
The sale on Saturday = x+2 = 6 + 2 =8
The sale on Sunday = x+4 = 6+4 =10
Step-by-step explanation:
Let x be the sale of Friday
Then
x+2 will be the sale of Saturday
x+4 will be the sale of Sunday
According to the given statement, that the total sales were 24

The sale on Friday = x = 6
The sale on Saturday = x+2 = 6 + 2 =8
The sale on Sunday = x+4 = 6+4 =10
Keywords: Linear equations
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