Choose the correct options for the following questions.
For all positive integral values of n, $11^{n+2}+12^{2n+1}$ is divisble by
Difficulty: Easy
A:
133
B:
134
C:
135
D:
113
For all positive integral values of $n, x^{2n-1}+y^{2n+1}$ is divisble by
Difficulty: Easy
A:
x-y
B:
x+y
C:
$x^{2}+y^{2}$
D:
$x^{2}+xy$
$1^{3}+3^{3}+5^{3}+.......+$ up to $(2n-1)^{3}$ is equal to
Difficulty: Easy
A:
$n^{3}(2n^{3}-1)$
B:
n(2n-1)
C:
$n^{2}(2n^{2}+1)$
D:
$n^{2}(2n^{2}-1)$
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