show that 5n can't end with the digit 2 for any natural numbers
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5n
i) if n=1 then 5n =5*1=5
ii) if n=2 then 5n=5*2=10
iii)if n=3 then 5n=5*3=15
iv) if n=4 then 5n=5*4=20
Like for all. Natural values of n, 5n ends with 0 or 5
It never ends with 2
i) if n=1 then 5n =5*1=5
ii) if n=2 then 5n=5*2=10
iii)if n=3 then 5n=5*3=15
iv) if n=4 then 5n=5*4=20
Like for all. Natural values of n, 5n ends with 0 or 5
It never ends with 2
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