A 2-digit number less than 54 gives a remainder of 1 when divided by 5. It gives a remainder of 1 when divided by 10. List the possible number(s) in ascending order.
Multiples of 5: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50
Multiples of 10: 10, 20, 30, 40, 50
Multiples of 5 (+ 1): 6, 11, 16, 21, 26, 31, 36, 41, 46, 51
Multiples of 10 (+ 1): 11, 21, 31, 41, 51
List of possible number(s) = 11, 21, 31, 41, 51
Answer(s): 11, 21, 31, 41, 51