Infosys Company Logical Reasoning General Mental Ability

How can 1000000000 be written as a product of two factors neither of them containing zeros

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Infosys Other Question

A man collects cigarette stubs and makes one full cigarette with every 8 stubs. If he gets 64 stubs how many full cigarettes can he smoke. Light glows for every 13 seconds . How many max. times did it glow between 1:57:58 and 3:20:47 am.