Two-digit 3456

Write all the two-digit numbers that can be composed of the digit 7,8,9 without repeating the digits. Which ones are divisible
b) two,
c) three
d) six?


a = (Correct answer is: 78,79,87,89,97,98) Wrong answer
b = (Correct answer is: 78,98) Wrong answer
c = (Correct answer is: 78,87) Wrong answer
d = (Correct answer is: 78) Wrong answer

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