1
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0

$$(2^{3n}-1)$$ is divisible by

A
6
B
7
C
8
D
9
2
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0

$$\sum\limits_{n = 1}^m {n\,.\,n!} $$ is equal to

A
$$m! - 1$$
B
$$(m - 1)! - 1$$
C
$$(m + 1)! - 1$$
D
$$m!(m - 1)!$$
3
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0

If nC3 = 220, then n = ?

A
11
B
12
C
10
D
9
4
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0

There are 12 points in a plane out of which 3 points are collinear. How many straight lines can be drawn by joining any two of them?

A
60
B
64
C
72
D
84
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