Hi, can anybody help solve these questions
without the use of
algebra? My sis is in P6 and she doesn't have the knowledge of
solving algebraic / simultaneous equations... Many
thanks!
1) John had 239 male and female fishes. 3/5 of
the male fishes died and he bought another 14 more female fishes.
As a result, the number of female fishes he had was 1/4 of the
number of male fishes. How many male and female fishes were there
at first?
2) A jar contained some red and blue erasers. At
first, the number of red erasers was 75% of the blue erasers. After
adding in another 3 erasers of each colour, the number of red
erasers becomes 80% of the number of blue erasers. How many erasers
of each colour were there at first?
3) In a classroom, when a boy stands up, the
number of boys sitting becomes 4/5 of the number of girls
sitting. On the other hand, when a girl stands up, the number of
girls sitting becomes 8/7 of the number of boys sitting. How many
boys and girls are there in the class?
4) The ratio of $2 notes to $5 notes in James'
piggy bank was 13:8 He exchanged 20 pieces of $2 notes for some $5
notes, after which, the ratio of $2 notes to $5 notes became 4:5.
What was the total value of $2 notes and $5 notes in the piggy bank
at first?
Answers to any questions will be very much
greatly appreciated! =)
Thank you very much in advance!