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Maths Puzzle
Numerical Ability
Area and Volume
A pencil cost rs .25,a pen cost rs 10 and a book cost rs25.how many each,one should buy so that the total no. of articles is 100and total amount 1000rs
Read Solution (Total 3)
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- 0.25x + 10y + 25z = 1000 or (x + 40y + 100z) = 4000 ....(1)
x + y + z = 100 .......(2)
(1) - (2) => 39y + 99z = 3900 => 13y + 33z = 1300
(y , z ) = (1,39),(34,26)
=> (x,y,z) = (60,1,39) and (40,34,26)
- 12 years agoHelpfull: Yes(4) No(0)
- pencil=60
pen=1
book=39
total=60*0.25+1*10+39*25=1000 - 12 years agoHelpfull: Yes(0) No(1)
- penc 100=4000
pen 100 =1000
book 100=2500
10*30=300
25*11=275
.25*59=425 - 12 years agoHelpfull: Yes(0) No(0)
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