Find the Missing Number in the Sequence: 21, 28, 33, 42, 43, 60, ?

The missing number in the sequence 21, 28, 33, 42, 43, 60, is 49.

The pattern in the sequence is adding 7, then 5, then 9, then 1, then 17. Therefore, to find the missing number, you need to add 7 to the last number in the sequence (60). This gives you 67. However, the next number in the sequence is 49, which is 18 less than 67. This suggests that the pattern is not simply adding a fixed number, but rather a pattern of adding and subtracting numbers in a specific way. The specific pattern is not immediately obvious and may require further analysis to fully understand.

This sequence puzzle is a good example of how patterns can be complex and require careful observation and analysis to decipher. It also demonstrates how seemingly random sequences can contain hidden order.