Answer :

Answer: 6

Step-by-step explanation: To determine the mode:

1. Count the frequency of each digit in the number:

- The digit 6 appears 4 times.

- The digit 8 appears 2 times.

- The digit 9 appears 2 times.

2. Since the digit 6 appears the most frequently (4 times), the mode of the given number is 6.

Therefore, the mode of the number 88669686 is 6.