Diana practices piano 2 hours every Monday, Wednesday, and Friday. Tuesdays and Thursdays she practices 2.5 hrs. Saturdays and Sundays - 1 hr. How many hours does she practice every 2 weeks?
A box contains 2 red and 7 yellow marbles. How many red marbles must be added to the box so that 50% of all marbles will be red?
40 percent of 200 is equal to 8 percent of what?
In Allentown, 5/6 of the workers are married and 5/6 of the married workers have children. What fraction of all workers in the town are married without children?
For which of the following numbers is the reciprocal of one of the numbers equal to the square
of the other:
I. 1/5 and 25
II. 3 and 1/9
III. 1 and 1
If 12 out of 20 problems on a test were correct, what percent of all problems are wrong?
If two middle digits of a number 1234 are interchanged, the resulting number is
3, 4, 7, 11 ...
Find the eighth term in this sequence.
If
, then x =