Question

Which sequence can be represented by the expression 12n?

144, 132, 120, 108,…

1, 12, 24, 36,…

12, 24, 36, 48,…

6, 18, 30, 42,…

Answer 1

clearly A

144 = 12x12 n = 12

132 = 12x11 n = 11

120 = 12x10 n = 10

108 = 12x9 n = 9

Answer 2

Seems like C works too.

Answer 3

midpoint of AC=((-1+11) /2,( 5+13)/2)) i.e (5,9)
midpoint of BD=((2+8)/2,(6+2)) i.e (5,4)
slope of AC=(13-5)/(11-(-1))=8/12=2/3
Slope of BD=(6-2)/(2-8)=4/-6=-2/3
Slope of AC *Slope of BD=2/3*-2/3=-4/9 (not equal to -1)
ABCD not a rhombus.