Question 888197
The sum of the two digits of a two digit number is 15 and the difference between the two digits of the two digit number is 3. What is the product of the two digits of the two-digit number?
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let u=units digit
let t=tens digit
..
u+t=15
u-t= 3
add
2u=18
u=9
t=15-u=6
product of the two digits of the two-digit number=9*6=54