self Maths Puzzle

if A does 10 works in 5 min and B does 5 works in 10 min.find the number of works when they combined together to work in 30 min.

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self Other Question

vipul bhaiya i also wanna last 10 yrs tcs qstn papers...plzzzz mail me on this Email-id-->shubhamkumar192@gmail.com What is the missing number.
8,22,44,.....,112