Exam Maths Puzzle Numerical Ability Algebra

A soda water container was 4/5 full. When 6 bottles of soda water were taken out and four bottles of soda water were poured into it, it was 3/4 full. How many bottles of soda water can the container contain?

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Exam Other Question

A box contains 4 mangoes and 5 oranges. In how many ways can I make a selection so as to take at-least one mango and one orange ?

A book seller fixed his selling price of books at 40% above the Cost Price. He sells half of the stock of books at this price now he offers a discount of 15% on original SP for one quarter of stock and remaining at a discount of 30% on original SP. Find the gain percent altogether.