1
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
2
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0

A regular polygon of n sides has 170 diagonals, then n is equal to

A
$$-$$20
B
$$-$$17
C
$$-$$24
D
20
3
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0
How many 5-digit numbers greater than 50,000 can be formed using the digits 1, 2, 3, 4, 5 without repetition?
A
60
B
72
C
120
D
48
4
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

The value of $$1\,.\,1! + 2\,.\,2! + 3\,.\,3! + \,...\, + \,n\,.\,n!$$ is

A
$$(n + 1)!$$
B
$$(n + 1)! + 1$$
C
$$(n + 1)! - 1$$
D
None of these
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