here is your answer please start following me and mark me as brainalist and drop me some THANKS I will be very grateful to you Step-by-step explanation:The given digits are 7,0,6 and repetition of digits is not allowed.The one-digit numbers that can be formed are 7 and 6.We are required to write 2−digit numbers.Out of the given digits, the possible WAYS of choosing the two digits are7,0;6,0;6,7Using the digits 7 and 0, the numbers are 70.Similarly, Using the digits 6 and 7, the numbers are 67 and 76.Hence, all possible 2−digit numbers are60,70,67,76Now, we are required to write 3−digit numbers using the digits 7,0,6 and the repetition of the digits is not allowed. Keeping 0 at unit's place, 3−digit number obtained are 670 and 760.Keeping 6 at unit's place, 3−digit number obtained are 706.Keeping 7 at unit's place, 3−digit number obtained are 607.Hence ,all possible 3−digit numbers are: 670,764,706 and 607.All possible numbers using the digits 7,0 and 6 are6,7,76,67,70,60,706,607,760,670