Tuesday, April 6, 2010

Whole Number P6 2009 SA1 P2 Rulang Q8

8. Uma had 6 times as many white beads as red beads. For every 5 white beads she used to make a necklace, she used 3 red beads. When she used up all the red beads, she had 52 white beads left. How many red beads did she have? [3]


                 <--------- 52 --------->
W  [][][][][][][][][][][][][][][][][][]
R   [][][]

13 u -- > 52
1 u -- > 52 ÷ 13 = 4

3 u -- > 3 x 4 = 12 red beads


She had 12 red beads.

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