GRE
The units digit of $$149^{2k}$$
The units digit of $$143^{2k}$$
The tens digit of n squared
6
The tens digit of ($$4^{100}$$)($$5^{99}$$)
The tens digit of ($$4^{100}$$)($$5^{101}$$)
The remainder when 9 is divided by r
3
The remainder when ($$123^{4}$$-$$123^{3}$$+$$123^{2}$$-123) is divided by 122
2
The remainder when the difference of $$3191^{2020}$$ and $$3159^{2020}$$ is divided by 16
1
r
The least possible value of n
12
The number of values of $$n$$ that satisfy the three conditions
$$4$$
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