The tens digit of a two-digit number is two more than its unit digit.
Question 1:
The tens digit of a two-digit number is two more than its unit digit. The two-digit number is 7 times the sum of the digits. Find the units digits?
A.1
B.2
FeedbackLet the two-digit number be 10a + b a = b + 2 --- (1) 10a + b = 7(a + b) => a = 2b Substituting a = 2b in equation (1), we get 2b = b + 2 => b = 2 Hence the units digit is: 2.
C.3
D.4
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