How to do?
1. Ann had a bag of glass beads .She used half of the beads respectively to make a necklace . She and her sister then use 1/6 and 1/7 of the beads respectivelyto make two bracelets . If there are 16 glass beads left , find the original number of glass beads.
Maths questions...How to do?
2007-08-07 10:57 pm
回答 (2)
2007-08-07 11:43 pm
✔ 最佳答案
Let x be original no. of beads0.5x + x/6 + x/7 + 16 = x
21x + 7x + 6x + 672 = 42x
8x = 672
x = 84
Therefore, there is 84 no. of beads originally.
2007-08-07 11:42 pm
The original number of glass beads = 16 / (1 - 1/2 - 1/6 - 1/7)
= 16 / (16 / 84)
= 84
= 16 / (16 / 84)
= 84
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