Base/Power | 1 | 2 | 3 | 4 |
1 | 1 | 1 | 1 | 1 |
2 | 2 | 4 | 8 | 6 |
3 | 3 | 9 | 7 | 1 |
4 | 4 | 6 | 4 | 6 |
5 | 5 | 5 | 5 | 5 |
6 | 6 | 6 | 6 | 6 |
7 | 7 | 9 | 3 | 1 |
8 | 8 | 4 | 2 | 6 |
9 | 9 | 1 | 9 | 1 |
Base/Power Table
This is the Base/Power table to find last digit of a number. A power of 4 will be iterative after it all pattern will repeat, so we are taking only 4 power value.
There are few steps to find:
Let any number is ab
Step 1: Find remainder of b by 4
Ex: c=b%4
Step 2: Find the last digit of base number.
i.e: a=243 then last digit of number will be d=3
Step 3: Now find value in Base/Power table of d/c. This value will be your final answer.
Practice
Find the last digit of (135843)24586.
Solution
According to Assumption a=135843 and b=24586
Step 1: c=24586%4, c=2
Step 2: d=3
Step 3: in Base/Power table d/c or 3/2 will be 9.
So, finally the last digit of (135843)24586 will be 9.
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