LAST WEEK'S SOLUTIONS.

Evening Post, Volume CVIII, Issue 102, 26 October 1929, Page 31

LAST WEEK'S SOLUTIONS.

The.'.'L^w" o.£ Averages.—The average daily earnings' Were twenty '.seven and sixpence. The reader will note that the solution is arrived at, not byadding ' the"' daily averages for each month and dividing by'three, but by taking the gross earnings and dividing by the number of days in the three months, viz., 92. Another Example.—Tho number of matches played was fifteen. At. a; Department Store.—Thirty buyers. A Postage Stamp Puzzle—Nineteen. If five ' persons bought twenty-five stamps; at threepence and five at fourpence each, the remaining fourteen buyers must have purchased fourteen at threepence and fifty-six at fourpence each, one hundred stamps in all. High Value Stamps.—A, two at twelve shillings each; B, one at thirty and one at six shillings; C, one at fifteen; and D, one at sixty shillings. ANSWERS TO CORRESPONDENTS. T.M.H.-^-It can be calculated without use of iigher mathematics, provided the flexible steel tape has a smooth surface, -and is rolled tightly into circular form. In that case the only-data-required is length and thickness of tape. ♦•Figures:"—The rule is that when the lengths-of the four sides are in arithmetrieal progression the greatest area is -the square root of the product. •'Radio."—Only by artifice, as it is ! impossible geometrically. j