A 2-digit number less than 50 gives a remainder of 3 when divided by 4. It gives a remainder of 1 when divided by 10. List the possible number(s) in ascending order.
Multiples of 4: 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48
Multiples of 10: 10, 20, 30, 40, 50
Multiples of 4 (+ 3): 7, 11, 15, 19, 23, 27, 31, 35, 39, 43, 47, 51
Multiples of 10 (+ 1): 11, 21, 31, 41, 51
List of possible number(s) = 11, 31, 51
Answer(s): 11, 31, 51