book
Maths Puzzle
Numerical Ability
Factor each of the following.
1) a2-9
2) 4a2-4a+1
3) y2+16y+64
4) 81r2 -36rs +4s2
5) x2 +3x+2
6) x2+8x+12
7) 72 - 22x+x2
8) x2 +x-6
9) x2-5x-24
10) 3x2+11x+10
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book Other Question
If the number of square units in the area of circle C is twice the number of linear units in the circumference of C, what is the number of square units in the area?
(A) 4
(B) 8
(C) 4π
(D) 8π
(E) 16π
I believe this is linear algebra.
Two rivers running from south to north,
Is this well defined or not well defined?