The answer would be 48. This is because 60 counts as the first number in the sequence. The second number is equal to 60 - 3 = 57. The third number in the sequence is equal to 57 - 3 = 54. The fourth number in the sequence is equal to 54 - 3 = 51. The fifth and final number in the sequence is equal to 51 - 3 = 48. Hope this helps!