What is the number of ones digit when you multiply three 50 times (50th power of 3)?
Answer
The number of ones digit comes to a repetition of 3-9-7-1.
Calculates how many times four repetitions are contained in 50 times, it is 50/4=12 remainder 2.
This remainder 2 indicates that the number of ones digit at 50th time of multiple is the second number in the repetition of four numbers which is 9.
9
Solution
3 × 3 = 9, 9 × 3 = 27, 27 × 3 = 81, 81 × 3 = 243, ---------.The number of ones digit comes to a repetition of 3-9-7-1.
Calculates how many times four repetitions are contained in 50 times, it is 50/4=12 remainder 2.
This remainder 2 indicates that the number of ones digit at 50th time of multiple is the second number in the repetition of four numbers which is 9.
