Exam Maths Puzzle Category

Ravi went to Kanpur from Lucknow by his four wheeler. During the journey he has to use the spare wheel(stepney) Thus he finished his 160km journey. The average distance covered by the wheels of his car is?

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Exam Other Question

A company makes a mixture which contains 2% alcohol. If 10 litres of alcohol is added to the mixture, then the concentration increases to 5%. What is the approx. quantity of the mixture?
A. 316
B. 315
C. 310
D. 300
20,20,24,42,90, ?