I am a number between 70 and 80. If 6 is taken away from me, then my ones-digit becomes 8.
14
Who am I?​

The answer is 75.

Step-by-step explanation:

The answer must be in the 70's therefore you will have a 7 in the tens place. 7-2=5 and therefore, you will need a 5 in the ones place. Thus, the answer is 75.

You have 7 tens and 5 ones. Therefore, you have 2 more tens than you have ones (7-5=2)

answer4 to the second power is 16

and 4 to the third power is 64,