
By: geniuskids (offline) Sunday, August 19 2012 @ 09:07 AM CDT (Read 1150 times)



geniuskids 
Q15 : 4 children sold some charity coupons. Aida sold 3 times as many coupons as Bala. Cindy sold 58 more coupons than Aida. Dennis sold 153 more coupons than the total number of coupons sold by Aida, Bala & Cindy. The number of coupons sold by Dennis was also 685 more than Bala. What was the total number of coupons sold by the children?
Q16 : Sally bought some fish. 1/5 of all the fish bought were guppies. The ratio of the number of goldfish to the number of swordtails is 2:1. The prices of the fish were shown below:
Types of fish Cost of each type of fish
Guppies $1.20
Goldfish $2.30
Swordtails $1.80
She spent $116.80 in total. How many swordtails did she buy?

Active Member
Registered: 11/12/11 Posts: 169





By: GIM (offline) Monday, August 20 2012 @ 10:01 AM CDT



GIM 
Q15
D [___][___][___][___][___][___][___][_58_][___153___]
C [___][___][___][_58_]
A [___][___][___]
B [___]<685>
6 units > 685  (58+153) = 474
1 unit > 474 ÷ 6 = 79
Total > (7 + 3 + 3 +1) x 79 + (58 + 58+ 153) = 1375 coupons

Regular Member
Registered: 11/07/10 Posts: 70





By: GIM (offline) Monday, August 20 2012 @ 10:25 AM CDT



GIM 
Q16
Guppies : 1/5T = 3/15 T
Remainder : 1  3/15 = 12/15 T
Goldfish : 2/3 remainder > 2/3 x 12/15 = 8/15 T
Swordtail : 1/3 remainder > 1/3 x 12/15 = 4/15 T
Ratio of Guppies : Goldfish : Swordtail is 3 : 8 : :)
Tabulated as follows:
Guppies3 units120¢360
Goldfish8 units230¢1840
Swordfish4 units180¢720
Total 2920 value units
2920 units > 11680
1 unit > 11680 ÷ 2920 = 4
Nbr of swordtail > 4 units x 4 = 16

Regular Member
Registered: 11/07/10 Posts: 70





By: geniuskids (offline) Wednesday, August 22 2012 @ 08:03 AM CDT



geniuskids 
Thanks GIM, u are wonderful.

Active Member
Registered: 11/12/11 Posts: 169



