In an election between two candidates, one got 55% of the total valid votes, 20% of the votes were invalid. If the total number of votes was 7500, the number of valid votes that the other candidate got, was:

The salary of a worker is first increased by 30% and afterwards reduced by 30%. What is net change in his salary?

Bholu conducts his business in the following manner: Every once in while he raises his prices by a certain percentage and a while later reduces his price by the same percentage. After one such up-down cycle of increasing and then decreasing his price by x %, the price of the commodity decreases by Rs 100. In the next cycle, he increases and decreases his price by (x/2)%  and then sells the commodity for Rs 2376. What is the initial price of the commodity?

A box has 100 blue balls, 50 red balls and 50 black balls, 25% of blue balls and 50% of red ballsare taken away. Then, percentage of black balls at present is

47% of the students in a class of 34 students has glasses or contacts. How many students in the class have either glasses or contacts?

The daily wage is increased by 50% and a person now gets Rs 25 per day. What was his daily wage before the increase ?

The cost of the raw material of a product increases by 30%, the manufacturing cost increases by 20%and the selling price of the product increases by 60%. The raw material and the manufacturing cost, originally, formed 40% and 60% of the total cost respectively. If the original profit was one-fourth the original manufacturing cost, find the approximation new profit percentage.

If population of certain city increases at the rate of 5%. If population in 1981 was 138915, then population in 1978 was?

A number is increased by 20% and then decreased by 20%, the final value of the number is?

The salary of a typist was at first raised by 10% and then the same was reduced by 5%. If he presently draws Rs.1045.What was his original salary?

The percentage of metal extracted from a mine of lead ore is 50%.Now the percentage of gold is 4/5 % of the metal and the rest is lead. If the mass of ore extracted from the mine is 6000kg, the mass of the lead is

Victor gets 92 % marks in examinations. If these are 460 marks, find the maximum marks.

A student attempts x number of questions. He answers 15 correctly out of first 20 questions and of the remaining questions, he answers 1/3 correctly. If all questions have same credit and the student gets 50 % marks, then find the value of x.

If 80% of a number added to 80 gives the result as the number itself, then the number is

In an examination, 1100 boys and 900 girls appeared, 40% of the boys and 50% of the girls passed the examination. The percentage of candidates who failed is:

Out of his income Mr Raj spends 20% on house rent and 70% of the rest on household expenditure. If he saves Rs 3600 per month, then his total income per month (in Rs) is

75 g of sugar solution has 30% sugar in it. Then, the quantity of sugar that should be added to the solution to make the quantity of the sugar 70% in the solution, is

What percentage of numbers from 1 to 70 have 1 or 9 in the unit’s digit?

In a certain school, 20% of students are below 8 years of age. The number of students above 8 years of age is  of the number of students of 8 years of age which is 48. What is the total number of students in the school?

The population of a town increased from 1,75,000 to 2,62,500 in a decade. The average percent increase of population per year is:

Three candidates contested an election and received 1136, 7636 and 11628 votes respectively. What percentage of the total votes did the winning candidate get?

40 is subtracted from 60% of a number, the result is 50. Find the number?

60% of a number is added to 120, the result is the same number. Find the number?

In a certain school, 20% of students are below 8 years of age. The number of students above 8 years of age is 2/3 of the number of students of 8 years of age which is 48. What is the total number of students in the school?

How much is 80% of 40 is greater than 4/5 of 25?

Two tailors X and Y are paid a total of Rs. 550 per week by their employer. If X is paid 120 percent of the sum paid to Y, how much is Y paid per week?

A small and medium enterprise imports two components A and B from Taiwan and China respectively and assembles them with other components to form a toy. Component A contributes to 10 of production cost. Component B contributes to 20 of the production cost. Usually, the company sells this toy at 20% above the production cost. Due to increase in the raw material and labour cost in both the countries, Component A became 20 costlier and component B became 40 costlier. Owing to these reasons the company increased its selling price by 15. Considering that cost of other components does not change, what will be the profit percentage, if the toy is sold at the new price?

A salesman sells two kinds of trousers: cotton and woollen. A pair of cotton trousers is sold at 30% profit and a pair of woollen trousers is sold at 50% profit. The salesman has calculated that if he sells 100% more woollen trousers than cotton trousers, his overall profit will be 45%. However, he ends up selling 50% more cotton trousers than woollen trousers. What will be his overall profit?

Two persons Raj and Ramu started working for a company in similar jobs on January 1, 1991. Raj’s initial monthly salary was Rs 400, which increases by Rs 40 after every year. Ramu’s initial monthly salary was Rs 500 which increases by Rs 20 after every six months. If these arrangements continue till December 31, 200. Find the total salary they received during that period.

Peter got 30 of the maximum marks in an examination and failed by 10 marks. However, Paul who took the same examination got 40 of the total marks and got 15 marks more than the passing marks. What were the passing marks in the examination?