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A number of two digits is such that four times the unit digit is five times greater than the tens digit. When the digits are re...Asked by Ferami
A number of two digits is such that four times the unit digits is greater than Thrice the ten digits when the Digits are Reverse the number increase by nine
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Answered by
oobleck
The digits are xy. Then
10y+x = 10x+y+9
9y = 9x+9
y = x+1
so the possibilities are
89,78,67,56,45,34,23,12
Now, we also know that 4y > 3x
That doesn't help any, since we already know that 3y>3x.
I suspect a typo.
10y+x = 10x+y+9
9y = 9x+9
y = x+1
so the possibilities are
89,78,67,56,45,34,23,12
Now, we also know that 4y > 3x
That doesn't help any, since we already know that 3y>3x.
I suspect a typo.
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