Sightnecity of a number

Sightnecity of a number

Description :


 Sightnecity of 2 is 4 [2 4 8 16 32]

 Sightnecity of 3 is 4 [3 9 27 81 243]

 sightnecity of 4 is 2 [4 16 64]

 sightnectiy of 5 is 1 [5 25]

 sightnecity of 6 is 1 [6 36]

 sightnecity of 7 is 4 [7 49 343 2401 16807]

 sightnecity of 8 is 4 [8 64 512 4096 32768]

 sightnecity of 9 is 2 [9 81 729]


Where to apply?


 Ques>  Find the digit in ones place of 3^65 (read as 3 raise to(power)65) ?

 soln> The sightnecity of 3 is 4. so you need to divide 65/4, you will get 16 as quotiant and 1 as remainder.
           1*3 = 3.
           your answer is 3.


 Ques>  Find the digit in ones place of 6^9?


 Soln> The sightnecity of 6 is 1.  Divide 9 by 1. we get 0 as reminder.
           your answer is 6.