1
NDA 2019 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
If n! has 17 zeroes, then what is the value of n?
A
95
B
85
C
80
D
No such value of n exists
2
NDA 2019 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
What is the number of diagonals of an octagon?
A
48
B
40
C
28
D
20
3
NDA 2019 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
If P(n, r) = 2520 and C(n, r) = 21, then what is the value of C(n + 1, r + 1)?
A
7
B
14
C
28
D
56
4
NDA 2019 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
If C(20, n + 2) = C(20, n $$-$$2), then what is n equal to?
A
8
B
10
C
12
D
16
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