+0  
 
0
116
1
avatar

A positive integer $k$ is called a "lucky" number if the units digit of $k^4$ is 6. How many lucky numbers smaller than 1000 are there?

 Aug 20, 2022
 #1
avatar
0

listfor(k, 1, 5, k^4)==(1, 16, 81, 256, 625) ==Just 2 such "lucky" numbers: 16  and  256

 Aug 21, 2022

38 Online Users

avatar