Quantitative Aptitude - Arithmetic Ability Questions

(1 + sec 20° + cot 70°)(1 - cosec 20° + tan70°) is equal to

A person scores 45% of the total marks in the exam and still fails by 40 marks. The passing percentage of the exam is 55%. What is the maximum marks of the exam?

The sum of three numbers is 162. If the ratio of the first number to the second number is 5 : 7 and that of the second number to the third number is 5 :3, then what is the second number?

A shopkeeper, sold cashew nuts at the rate Rs 1,260 a kg and bears a loss of 8%. Now if he decides to sell it at Rs 1,386 per kg, what will be the result?

A dishonest milkman buys milk at Rs 30 per litre and adds 1/5 of water to it and sells the mixture at Rs 32 per litre. What will be his gain?

If 3x= 4y= 12, then z is equal to

If 5x + 1/x = 10, then x2 + 125x2 is equal to

If a number is decreased by 10%, it becomes 54. To make it 72, it should be increased by