28 SAT Math Lessons to Improve Your Score in One Month - Advanced Course: For Students Currently Scoring Above 600 in SAT Math and Want to Score 800 by Warner Steve

Author:Warner, Steve [Warner, Steve]
Language: eng
Format: azw3, epub
Published: 2014-11-20T16:00:00+00:00

10.The sum of the positive odd integers less than 200 is subtracted from the sum of the positive even integers less than or equal to 200. What is the resulting difference?

3, 9, 27,…

11.The first term of the sequence above is 3, and each term after the first is three times the preceding term. Which of the following expressions represents the nth term of the sequence?

(A)3n

(B)(n – 1)3

(C)n3

(D)3n–1

(E)3n

12.125 blank cards are lined up in one long row. In the upper left hand corner of each card a number is written beginning with 1 on the first card, 2 on the second card, and so on until 125 is written in the upper left hand corner of the last card in the row. Now another number is written in the lower right hand corner of each card, this time beginning with 125 on the first card, 124 on the second card, and so on until 1 is written in the lower right hand corner of the last card. Which of the following is a pair of numbers written on the same card?

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