Q.1 Which of the following statements are true?
A.If a number is divisible by 3,it must be divisible by 9.
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B.If a number is divisible by 9,it must be divisible by 3.
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C.A number is divisible by 18,If it is divisible by both 3 and 6
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D.If a number is divisible by 9 and 10 both then it must be divisible by 90
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E.If two numbers are co-prime at least one of them must be prime.
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F.All numbers which are divisible by 4 must also be divisible by 8.
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Pls answer these
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