complete sat guide 2010, 13th edition, gary gruber, p14, #15 (using ti-84)
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8/9/2019 Complete SAT Guide 2010, 13th Edition, Gary Gruber, p14, #15 (using TI-84)
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SAT - Math Page 1 of 5
p0014.n15 Mr. Bujak
Complete SAT Guide 2010, 13th
edition
Gary R. Gruber, Ph.D., p14, #15
Edward Bujak
The sum of the cubes of any two consecutive positiveintegers is always
[A] an odd integer[B] an even integer
[C] the cube of an integer[D] the square of an integer
[E] the product of an integer and 3
Native TI-84 functionality:
L1 is nL2 is
33 1n n
L3 is 33 33 1 2n n L
L4 is 33 1 2n n L
L5 is
33 1 2
3 3
n n L
Notice that the units (ones) digit of 33 1n n is a cyclic pattern of 9-5-1-9-1 ==> odd
2nd column (L2) makes [B] incorrect.
3rd column (L3) makes [C] incorrect.
4th column (L4) makes [D] incorrect.5th column (L5) makes [E] incorrect.
8/9/2019 Complete SAT Guide 2010, 13th Edition, Gary Gruber, p14, #15 (using TI-84)
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SAT - Math Page 2 of 5
p0014.n15 Mr. Bujak
Clear the lists that we will use (L1, L2, L3, L4, L5)
Enter n from 1 to 8 in column 1 (L1):
8/9/2019 Complete SAT Guide 2010, 13th Edition, Gary Gruber, p14, #15 (using TI-84)
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SAT - Math Page 3 of 5
p0014.n15 Mr. Bujak
Enter 33 1n n in column 2 (L2):
Move to the L2 column label
8/9/2019 Complete SAT Guide 2010, 13th Edition, Gary Gruber, p14, #15 (using TI-84)
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