A vertical pole 6 feet high casts a shadow 4 feet long. At the same time a tree cast a shadow 64 feet long. What is the length, in feet, of the trees?

The average of six numbers is 6. If 3 is subtracted from each of the numbers, what is the new average?

What is the eight term of the sequence 1, 4, 9, 16, 25, ...., ...., .....?

A worker is paid d Dollar an hour for the first 8 hours. Four every hour after the first 8 hours, she is paid...

The total of 10 number is 462; the average of the first 4 numbers is 52; the average of the last 5 numbers is...

There are 50 students enrolled is business finance. Of the enrolled students, 90% took the final exam. Two thi...

A book had a catalogue price of Tk. 400. It was sold at a discount of 15% . If the book had a cost of Tk. 200,...