Cocker's Arithmetick : being a plain and familiar method, suitable to the meanest capacity, for the full understanding of that incomparable art, as it is now taught by the ablest school-masters in city and country. / Compos'd by Edward Cocker, late practitioner in the arts of writing, artihmetick, and engraving. Being that so long since promised to the world. Perused and published by John Hawkins, writing-master near St. George's church in Southwork, by the author's correct copy, and commended to the world by many eminent mathematicians and writing masters in and near London.

  • Cocker, Edward, 1631-1675
Date:
1708
Catalogue details

Licence: Public Domain Mark

Credit: Cocker's Arithmetick : being a plain and familiar method, suitable to the meanest capacity, for the full understanding of that incomparable art, as it is now taught by the ablest school-masters in city and country. / Compos'd by Edward Cocker, late practitioner in the arts of writing, artihmetick, and engraving. Being that so long since promised to the world. Perused and published by John Hawkins, writing-master near St. George's church in Southwork, by the author's correct copy, and commended to the world by many eminent mathematicians and writing masters in and near London. Source: Wellcome Collection.

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    at4 22° Double Pofition. hap. 3 22 Barty fF { Fae Pee take for my fecond Pofition 18, and then the error ij ~¥§ too much, then] mulciply the Pofictons atid’ Ere “rors crofs-wile, and the Produsts are 96-and $76, andd _ becaufe the Errore are unlike. 96. 672) 576 | 6% 7 18 i) 48) AR (4 a 32.4 A 16 < 48 (viz.) one too big, and anotier too little, Tadd thee Produés 96 and 576 together, and their Sum is 6732 fora Dividend, J likewife add the éfrors 32 and 166 together, and their Sum is 48 for a Divifor, chen has ving fiuifhed Divifion, { find the Quotient to be ray. ~ which is the Anfwer as was found out at the 2 feverau! Tryals before. ie > ee ee ee = 2 5 eh ct s iy Bee ave a ae ited iA = oH Ke BSc, Soe Wit pee 0 For proof of the Work I fay, 6 ae _ Then B Paid 14 and 10 (that 1) ——-— 24 oto oo ee Oe Day oo Se. ‘Then C Paid 14 and 24 (that #) — 3b a S The Sum of all is | 763 which is the Tota! value of the Building and equal rec the given Number. . Ps Thofe who defire to fee the demonftration of thi Rule, let them read the 7+h Chapter of Mr. Kerfey’s Apo pendix to Wingate’s Arithmetick, Petifcus in the $e’ Book of Trigonometria, or Mr. Oughtred in his Clhevin Mathematica. . ‘ SR ea ea ~ Queff. 2. Three Perfons, A, B, Gy thas’ difcourfecd together concerning their Age ; quoch A,¥ am 18 yearr: _ of Age; quoth B, Iam as Old as A and C;. anod -guoth C, Lam as\O'd as you both, if your Years were added together. Now I defire to know the Age op _ €ach Perfon? Anfwer, A is i8, B is 54, and C is 722 Quej EP a vears of Age. Pes Gh. : ws Sete Gy]