1) What is the common difference of the sequence -1, 3, 7, 11, 15, 19? a) -2 b) -4 c) 3 d) 4 2) What is the common difference of the sequence 23, 16, 9, 2, -5? a) -5 b) -7 c) 6 d) 9 3) What is the formula in finding the nth term of an arithmetic sequence? a) a1= an+(n-1)d b) an= a1+(d-1)n c) an= a1+(n-1)d d) an= a1+(n-1)d 4) 1, 3, 5, _____, _____, 11, _____15 a) 6, 7, 9 b) 7, 9, 12 c) 7, 9, 13 d) 8, 10, 12 5) Find the 16th term of the arithmetic sequence if the first term is -2 and the common difference is 6, a) 78 b) 88 c) 92 d) 112

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