A) 6
B) 0
C) 5
D) 8
Correct Answer: C
Solution :
[c] Product of first 40 odd natural \[=1\cdot 3\cdot 5\cdot 7\cdot 9.\,\,......\,\,79.\] \[=15\cdot (7\cdot 9\cdot \,\,.......\,\,79)\] =15 \[\times \] an old number So there will be 5 at unit place. So answer is 5.You need to login to perform this action.
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