A two-digit number has 6 in its unit digit. The sum of its digits is one-fourth of the number itself. What is the number?
A
36
B
46
C
66
D
76
Correct Answer: 36
Let the number be 10x + 6 (10x + 6) /4 = x + 6 10x + 6 = 4x + 24 6x = 18 x = 3 The number be ( 10×3 + 6) = 36