Explanation: The missing number is the sum of the first and last digits of each pair in the sequence. For example, in 1693, the sum of 1 and 3 is 4. Similarly, in 4972, the sum of 4 and 2 is 6. Following this pattern, the sum of 8 and 6 in 8165 is 14. Hence, the missing number in the sequence is 4.
4
Explanation: The missing number is the sum of the first and last digits of each pair in the sequence. For example, in 1693, the sum of 1 and 3 is 4. Similarly, in 4972, the sum of 4 and 2 is 6. Following this pattern, the sum of 8 and 6 in 8165 is 14. Hence, the missing number in the sequence is 4.