Increasing the original price of an item by 10% , then decreasing by 20% and then again increasing the price by 10% is equivalent:
(227 -75 + 12) is equal to
A two - digit number has 3 in its unit digit. The sum of its digits is one seventh of the number itself. what is the number ?
The[ triangular base of a prism is a right triangle of sides a and b = 2a . The height h of the prism is equal to 10 mm and its volume is equal to 40 mm3 , what will be the lengths of the sides a and b of the triangle ?
The same of principal and simple interest of a certain amount of money would be Tk. 460 after 3 years form now and Tk. 500 after 5 years for now . what is the total interest rate?
A wheel rotates 10 times per minutes and moves 20 m during each rotation . How many feet does the wheel move in 1 hours?
If x and y are consecutive positive integers, which of the following must be an even integer?
There are n students in a school. If r% among the students are 12 years or younger, which of the following expressions represents the number of students who are older than 12?
The ratio between the perimeter and the breadth of a rectangular is 5 : 1 . If the area of the rectangle is 216 cm2 , what is the length of the rectangle?
Three boys have marbles in the rotio of 19 : 5 : 3 If the boy with the least number has 9 marbles , how many marbles does the boy with the highest number have?
The area of a rectangle R with width 4 ft is equal to the area of a square S , which has a perimeter of 24 ft. the perimeter of the rectangle R, in feet, is __
In a class of 120 students 70 percent can speak only Bengali and the rest can speak English . If 25 percent of those in the class who can speak English can also speak Bengali , how many of the students in the class can speak bengali?
A lamp is manufactured to sell for $35.00, which yields a profit of 25% of cost . If the profit is to be reduced to 15% of cost , what will be the new retail price of the lamp?
In triangle ABC, AB = AC . All of the following statements are true except__
If an inspector rejects 0.08% of a product as defective , how many units of the product will he examine in order to reject 2 ?
There are 15 balls in a box 8 balls are green 4 are blue and 3 are white. Then 1 green and 1 blue balls are taken from the box and put away. what is the probability that a blue ball is selected at random from the box?
A short distance athlete has taken 60 seconds to cover 100 meters . If he makes 30 steps in 9 seconds , how many steps has he taken in that time?
Three angles of a triangle are in proportion 5 : 6 : 7. Then what is the difference in degrees between the biggest and the smallest angles?
If the length of each of the sides of three square garden's plots is increased by 50 percent, by what percent is the sum of the areas of the three plots increased ?
A manufacturer sells three products i.e A, B and C . Product A costs 200 and sells for 250, Product B costs 150 and sells for 180 , product C costs 100 adn sells for 110. On which product, he has maximum percentage of profit?
A farmer has two rectangular fields. The larger field has twice the length and four times the width of the smaller field. If the smaller field has area K, then the area of the larger field is greater than the area of the smaller field by what amount ?
Triangle ABC has the following vertices : A ( 1,0), B ( 5, 0) and C ( 3, 4) . which of the following is true ?
A student loses 1 mark for every wrong answer and scores 2 marks for every correct answer. If he answers all the 60 questions in an exam and scores 39 marks , how many of them were correct?