ISEE Upper Level Quantitative Reasoning Quiz
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A garden layout lists row lengths:
30
,
27
,
24
,
21
,
18
30, 27, 24, 21, 18
30
,
27
,
24
,
21
,
18
; what is the next term?
A
The next term is 15, using
d
=
−
3
d=-3
d
=
−
3
.
B
The next term is 36, using
r
=
1.2
r=1.2
r
=
1.2
.
C
The next term is 16, using
d
=
−
2
d=-2
d
=
−
2
.
D
The next term is 18, repeating the last term.
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