CAN YOU DO THESE SUMS ?

Dominion, Volume 3, Issue 866, 12 July 1910, Page 3

CAN YOU DO THESE SUMS ?

THE WORLD'S MATHEMATICAL WONDER. Mr. Arthur F. Griffith, known on the vaudeville stage as the "Marvellous Griffith," is a lightning calculator, ready to pit himself against all adding machines. He made a wager ono day in the State Auditor's office in Chicago, and for three hours performed the work (aside, from tho actual clerical part) of fourteen assistants.

Without pen, pencil, or paper; without slate, blackboard, or chalk, this wizard of ligurcs can raise a figure to tho sixth nower in about llsec.; can multiply throe figures by three figures in osec.; aiul can multiply nine figures by nine figures in Bscc. Griffith deals in niillions and quadrillions rather than, in tho ordinary digits.

Here are a few' of what he terms light mental exercises:—

What.is the compound interest on ono halfpenny at G per cent, from the birth of Christ to the present dato? What two sums of all numbers from ono upwards, added, mado a sum of all numbers from ono upward; subtracted, lcavo a sum of all numbers from one upward; and, multiplied, make a sum of all numbers from one upward added? AVhat number multiplied by threetenths, four-tenths, nine-tenths, tentenths, and twelve-tenths, does not leave one figure out or put another figure in the product?