IBM Company Numerical Ability Number System

My house number is
if not multiple by 3 it is with in 50-59
if not multiple by 5 it is with in 60-69
if not multiple by 10 it is with in 70-79
find house number.

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IBM Other Question

A does a work in 20 days. A did for 28 days. Then b came. They together take 76 days to complete the 7 job. Find howmany days B complete a work. After 6 years the ratio of age of X and Y will be 5:6. Before 6 years it was 3:4. Find the age of younger one.