Step 1: Concept
The rule for 2: 2 can divide any number that ends with even numbers 0, 2, 4, 6, 8.
The rule for 3: For a number to be divide by 3, its sum must be divided by 3.
The rule for 4: For a number to be divide by 4, the last two digits must be divided by 4
The rule for 5: For a number to be divided by 5, it must end with 0 or 5.
The rule for 6: A number is divisible by 6 if it is divisible by 2 and 3.
The rule for 8: A number is divisible by 8 if its last three digits are divisible by 8.
The rule for 9: For a number to be divisible by 9, its sum must be divisible by 9.
The rule for 10: For a number to be divided by 10, it must end with 0.
Step 2: Test for 766
766 can be divided by 2 because it ends with the even number 6.
766 cannot be divided by 3 because it sum (7+6+6 = 19) cannot be divide by 3.
766 cannot be divided by 4 because it last two digits cannot be divide by 4.
766 cannot be divided by 5 because it does not end with 0 or 5.
766 cannot be divided by 6 because it cannot be divide by 3
766 cannot be divided by 8 because the last three digits cannot be divided by 8.
766 cannot be divided by 9 because the sum of its digits cannot be divided by 9.
766 cannot be divided by 10 because the number did not end with 0.
Step 3: Final answer
2