j/5
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49 divided by 5 is as a mixed number is 94/5
2j+1/j+5 = 1 Multiply all terms by j+5 to eliminate the fraction: 2j+1 = j+5 2j-j = 5-1 j = 4
16 \;p
A prime number is a number that can only be divided by 1 and itself. While 5 can only be divided by 1 and 5, 9 can be divided by 1, 9 and 3. So 9 is not a prime number, 5 is.
As 25 is ending with 5 then it can be divided by 5 then 25 is not a prime number Any number ending with 0 or 5 ca be divided by 5, the ones ending by 0 can be divided by 10