what can be said about 1999!+199, it's a a) prime number b) a perfect square c) composite number d) perfect cube
varaddaithankar:
My answer may be wrong
whats the answer
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Answer:
A composite no.?
Step-by-step explanation:
because after 5 factorial nos . end up having units digit as zero so only we are left with 1! 2! 3! 4!
Whats the answer
I don't know the answer, but by knowing that after 4! all numbers end in 0, how we can conclude that it is a composite number.
Ur right but can we say 1999!+199 would have ones place and tenth place occupied by 9 and 9
so that we can say 99 are end digits
so if we look at options now because i think that no perfect sq and cube end in 99 is this correct or there is any no. we can eliminate 2 options
OK,
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