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http://mathnotations.blogspot.com/2014/08/free-ccsssatchallenge-math.html
1. Reg price:$N
40% discount $32 better than successive disc of 20%,20%
N=?
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2.
2^100-1 must be div by
I. 2^10-1
II. 2^50-1
III. 2^50+1
(A)I (B)II (C)I,II (D)II,III (E)I,II,III
Soln?
3.
Need quarters&dimes for 35¢ bus fare. Asked bank for most I could get from $10. How many dimes did I get?
Soln?
4.
(3/a)•(3/(a-12)) = -1
a=?
Relate this equation to a coord problem involving a right angle!
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5.
Mork's age
O-yrs 46 90
E-yrs 1 10
When O-age:E-age=5:1, E-age=? (Assume linear)
Soln sent to inbox?
6. Inscribe a circle of rad=1 in a reg hexagon and inscribe a 2nd reg hex in the circle. Show that the avg of the areas of the hex's = (7√3)/4.
What does this have to do with π?
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