A certain type of board is sold only in lengths of multiples of 2 ft. The shortest board sold is 6 ft and the longest is 24 ft. A builder needs a large quantity of this type of board in 5 1/2 ft lengths. For minimum wste the lengths to be ordered should be
Four children A, B, C and D divide a bag of sweets. A takes 1/3 of them, B 2/5the of the remainder and the rest is equally shared between C and D. What fraction of the sweets did C or D get ?
The use of antibiotic is a very effective way of killing disease causing bacteria. sometime people don't finish all of their pills. this can result in:
