Calculata ’ s Mission
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AQUiLA MAGAZINE
MONEY MATHS
Pounds , shillings and Picnics 2 Go !
Did you just love the mind-bending old money maths on pages 14-15 of the Money Maths issue of AQUILA ? Then this is just for you !
Calculata ’ s Mission
Congratulations on your new catering job at Picnics 2 Go . It ’ s been your life ’ s dream to make and deliver bespoke picnic hampers for a living , but … how do I say this ? There ’ s been a hiccup . Some kind of terrible time slip has taken place on your way to the Cash ‘ n ’ Carry and you ’ ve travelled back to 13 February 1971 . Now all your Valentine ’ s Day picnic hampers need assembling and you have to shop for ingredients and equipment using old money maths !
ACTIVITY SKILLS
30 minutes +
Use the information on pages 14-15 of the magazine , then check your method in the answers at the end . REMEMBER :
DIFFICULTY
£ 1 = 20s 1s = 12d 1d = 4 farthings
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Spoons How much are 66 spoons at 2 shillings each ?
Scotch eggs A bag of scotch eggs is 5 3 / 4d . How much are 100 bags ?
Chocolate bars How much are 100 chocolate bars at 6d each ?
Crisps What about 100 bags of crisps at 5d each ?
CONTINUED ON PAGE 2
Solutions
Spoons Long form : 66 x 2 = 132 shillings 132 / 20 = 6 remainder 12 , or £ 6 12s Using the trick :
YOU WILL NEED o Pen o Paper
Multiply the quantity by half of the price , then take the last digit of the answer and double it to get the number of shillings . Finally use the other digits as the pounds . 66 x 1 = 66 . To get the number of shillings we do 6 x 2 = 12 , then the first digit gives us the pounds , so the whole answer is £ 6 12s .
Scotch eggs Long form : Five pence equals 20 farthings , so 5 3 / 4d is 23 farthings . 23 farthings x 100 = 2300 farthings , and you would know from your pence tables that there are 960 farthings in a pound . 2300 / 960 is 2 remainder 380 . Or £ 2 and 380 farthings . You would also know there are 48 farthings in a shilling . 380 / 48 = 7 remainder 44 . Or 7s and 44 farthings You would also know there are four farthings in a penny .
44 / 4 = 11 with no remainder , or 11d . That gives us a total of £ 2 7s 11d .
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