Bunuel wrote:
Eggs are sold in packages of six or eleven only. If Doris bought 70 eggs exactly, what could be the number of large packs Doris bought?
A. 6.
B. 2.
C. 3.
D. 5.
E. 4.
Let number of packs of six = s
let number of packs of eleven = e
6s + 11e = 70
Now , we need to test for values of e .
Since sum 70 is even and 6s will always be even , e can't be odd .
Now , we can test for values e = 2 , 4 and 6
11*2 + 6*8 = 22 + 48 = 70
Answer B
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