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 By: Achiever (offline)  Thursday, February 16 2012 @ 12:50 AM CST (Read 1330 times)
Achiever

Anyone can solve these problems?

1. Bala bought a watch for \$315. He paid the cashier in \$10 and \$5 notes.
If there were 41 dollar notes altogether, how many \$5 notes were there?

2. Miss Ang buys some sweets. If she gives 3 sweets to each pupil, she will have 12 sweets left.
If she gives 4 sweets to each pupil, she will need 24 sweets more.

a) How many pupils are there?
b) How many sweets does she have?

3. If Wanwan gives Jingjing \$24, they will have the same amount of money.
If Jingjing gives Wanwan \$24, Wanwan’s money will be 9 times as much as that of Jingjing’s remaining money.
How much does Wanwan have at first?

4. 3 similar staplers and 4 similar hole-punchers cost \$36.
1 similar stapler and 3 such hole-punchers cost \$22.
Find the cost of 1 stapler?

Newbie

Registered: 02/15/12
Posts: 9

 By: achieve_goal (offline)  Thursday, February 16 2012 @ 06:22 AM CST
achieve_goal

Q1. The answer is:

\$10 notes: 22x10=220

\$5 notes: 19x5=95

22+19=41 dollar notes

\$220+\$95=\$315

Ans: 22 ten dollar notes

19 five dollar notes

Regular Member

Registered: 09/14/11
Posts: 102

 By: awyw1201 (offline)  Thursday, February 16 2012 @ 06:50 AM CST
awyw1201

1) suppose all 41 notes are \$5 notes
41x 5=205
315-205=110(diff)
10-5=5(diff btw one \$10 and one \$5)
110/5=22 (no. of \$10 notes)
41-22=19

Ans: 19 \$5 notes

2)
a)let the no. of children be 1u.
3u + 12= 4u - 24
1u= 36

b) 3 x 36 + 12= 120

Ans:a) 36 pupils. b) 120 sweets

3) W gives \$24 to J-----W has \$48 more than J at first
J gives \$24 to W---- W has 9 times as much as J
8 u= 24 + 48 + 24 = 96
1u = 12
12 + 24 + 48 = 84

Ans: \$84

4) 3S + 4H = 36-----(1)
1S + 3H = 22-----(2)
(2) x 3----3S + 9H = 66----(3)
Compare (1) and (3), we have
5H = 30
1H= 6
3H=18
Sub that into (2), we get
1S=22-18= 4

Ans: \$4

Regular Member

Registered: 07/08/11
Posts: 87

 By: Achiever (offline)  Thursday, February 16 2012 @ 07:15 PM CST
Achiever

Thanking your for helping to solve

Newbie

Registered: 02/15/12
Posts: 9

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