1)The average of three numbers is 39 and the median of the numbers is 48. What is the maximum of the least number?
2)If n=0.0025*0.025*0.00025*(2^k), and n>1, what is the least possible value of k?
A circle is randomly divided into eight arcs of 10, 20, 30, 40, 50, 60,70, 80 degree . An octagon can be formed by linking the eight points. The greatest possible inside angle could be:
155, 160, 165, 170, 175
At their respective rates, machine A produced 6000 nails and B produced 8000 nails. Is A takes more time than B?
1). B can produce 2000 more nails than A during an hour.
2). B's rate is twice that of A
How long time will is takes for x, y, and z to complete a certain work together?
1). It takes three hours for x and y to complete the work together.
2). It takes four hours for x and z to complete the work together.