15. If 18!10 = 4, 10!4 = 3 and 4!8 = -2, then ﬁnd the value of 16!18 – McqOptions

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1.	15. If 18!10 = 4, 10!4 = 3 and 4!8 = -2, then ﬁnd the value of 16!18.
A.	2
B.	-1
C.	-8
D.	9
Answer» C. -8

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