In a collection of green, red, and black marbles, there are 35% more green marbles than red marbles, and there are 60% more black marbles than green marbles. If A is the number of green marbles, what is the total number of marbles?

An archer shot at the target 80 times and missed it 36 times. From this, can you figure out what the probability of his hitting the target with the next arrow is.

Ahmed bought the following things when he got his first salary: A camera for SR 2355.05 A microwave for SR 6397.15 A computer for SR 17429.40 If his salary was SR 70000, what does he have left after all the shopping?

A square park has an area of 2025 sq. m. It has to be fenced. The fencing will require use of a wire that must be able to enclose the park 4 times, and each circuit of the wire would be 2 % greater than the perimeter of the park. What is the length of wire (in metres) needed for this?