It takes machine M, x hours to manufacture a deck of cards that machine N can manufacture in y hours. If machine M operates alone for z hours and is then joined by machine N until 40 decks are finished, for how long will the two machines operate simultaneously?
The graph below shows the average daily circulation (in thousands) of two newspapers (A and B) for ten years. Find the average daily circulation of A in the year the when combined average daily circulation was minimum.
Will picks a three digit number and subtract it from the same number after reversing order of its digits. This difference will always be fully divisible by which of following number?
of the principal. If the numbers representing the rate of interest (in percent) and time (in years) be equal, then what is the time, for which the principal is lent out?
The difference between the compound interest, compounded annually and the simple interest on a certain sum for ^@2 \space years^@ at ^@ 9 \% ^@ per annum is ^@ $ 243. ^@ Find the sum.
Hamish and Georgia each have a bag that contains one ball each of the colors pink, green, orange, black and grey. Hamish randomly selects a ball from his bag and puts it in Georgia's bag. Then Georgia randomly selects a ball from her bag and puts it in Hamish's bag. What is the probability that after this the contents of the bag are the same as before?
New Zealand