+0  
 
0
286
1
avatar

For how many integers, n with 1<=n<=20 is the tens digit of n^2 odd?

 Oct 1, 2021
 #1
avatar
0

There are 4 such integers.

n      n^2

4     16
6     36
14     196
16     256
 

 Oct 2, 2021

2 Online Users

avatar