GRE
The total number of positive 4-digit integers that can be formed where each digit is in set T and the 4 digits in each 4-digit integer are different from each other
(7)(6)(5)(4)
$$(27)^{-8}$$
$$(81)^{-6}$$
$$\sqrt{( 10^{2m} )( 10^{2n} )}$$
$$10^{mn}$$
m + n
2m
2r
$$\frac{1}{r}$$
The length of PQ
The length of PE
The remainder when $$3^{4n}$$ is divided by 10
1
r+t
12
n
4
The number of positive factors of $$pr^{2}$$
The number of positive factors of $$(p+3)(r+3)$$
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