After taking 30 socks out of the washing machine, Shamim noticed that the ratio of blue socks to brown socks to black socks was 2:3:5. How many black socks were in the washing machine?

If b

If an inspector rejects 0.08% of a product as defective, how many units of the product will be examined in ord...

Ms. Zareen purchased stock for Tk. 15,000 and 2/3 of it after its value doubled. She sold the remaining stock...

A car goes 15 miles on a gallon of octane when it is driven at 50 miles per hour. When the car is driven at 60...

The sum of two numbers is 56. If three times of the smaller number is one-half of the larger number, what is t...

Mr. Zaman is insured completely for Tk. 1,50,000 against damages to his machinery. For any damage over Tk. 1,5...