Question

7*7*7*7......153 times what is the digit at the unit place of the product

Answer 1

Answer:

Step-by-step explanation:

71=7  

72=49

73=343

74=2401

75=16807

⋯

Cyclic repetition of 7 is 4. Now, when 823543 is divided by 4 it gives remainder 3 Hence the last digit of 7823543=777 is 3