Compare the digits from left to right.<br><br>All numbers have 5 digits. Compare the ten-thousands: all are 6.<br>Compare the thousands: 3, 7, 3, 7.<br>&bull; The numbers with thousands digit 3 are smaller. Among 63742 and 63427: thousands both 3, hundreds: 4 &lt; 7, so 63427 is smallest, then 63742.<br>&bull; Among 67342 and 67234: thousands both 7, hundreds: 2 &lt; 3, so 67234 comes next, then 67342.<br><br>Final Answer: 63427, 63742, 67234, 67342