2008 PSLE
Questions
Q48 Bryan invited
20 more boys than girls to a party. 3/4 of the boys and 2/3 of the
girls came. 19 people didn't come. How many people did he
invite?
Q47 Visitors, 40%
are children, 3/4 of the adults are women. (a) what is the ratio of
children:men:women. (b) the second day, children number
increased by 20%, adults number remain the same but women is 3/5 of
adult. if there are 336 more children than women, how many visitors
on second day
Q46 A millipede
is climbing up a wall.
For every 3cm it climbs, it slips by 1cm.
It takes 3 seconds to climb 1 cm and 1 second to slip by 1cm.
(a) How far would the millipede have climbed after 1 minute?
(b) How long would the millipede take to climb 56cm?
Anyone has questions
for Q43, Q44, Q45 ?
Q48) Let 4 units to represent all the boys he invited and blah
blah
4 units = 3 parts + 20
1 unit + 1 parts = 19
Therefore, 4 units = 3(19-1 unit) + 20
4 units = 57 - 3 units + 20
7 units = 77
1 unit = 11
4 units = 44
3 parts = 44 - 20 = 24
He invited 44 + 24 = 68.
Q47)a)children:men:women = 40:45:15 = 8:9:3
b) 40 x 120/100 = 48% children
adults = remains at 60%
3/5 x 60% = 36% women
48 - 36 = 12%
12% = 336
1% = 28
Total percent in the end = 48 + 60 = 108%
108% = 3024
Correct me if i am wrong. lol quite hard.
Q 46) a) All together, one set = 4s
60 / 4 = 15 sets
15 x 2 = 30cm
b) 56 / 2 = 28 sets
28 x 4 = 112 cm.
