1. What should come next in the series: 77, 78, 75, 80, 73, 82,
....?
84
71
81
2. Look at this series: 3, 9, 27, 90, 243, 729,... One numeral
is wrong. What should it be?
80
79
83
3. In the series 1, 1, 1/2, 1/6, 1/24, ..., determine the 6th
term.
1/74
1/100
1/80
1/120
81
70
4. In the series 1, 1, 1/2, 1/6, 1/24, ..., determine the 6th
term.
1/180
1/100
1/74
1/120
5. A person has 2 parents, 4 grandparents, 8 great grandparents
and so on. How many ancestors during the 15 generations preceding
his own, assuming no duplication?
131,070
65, 534
16, 383
6. Find the sum of the infinite geometric progression 6,
-2, 2/3, .....
7/2
5/2
1 1/2
9/2
7. The 7th term of the geometric progression 2, 6, 18, ...
is
1458
5832
2919
729
8. Find the sum of the first 6 terms of a geometric sequence in
which a1 = 5 and r = -2
-315
315
-105
-210
5832
2919
729
9. Find the sum of the terms of geometric sequence in which a1 =
162, an = 2/9 and r = 1/3
262.89
242.89
242.22
222.89
10. Which of the given sets of numbers is a geometric
sequence?
-4, -8, -12, -16
1, 4, 16, 25, 36
6, 12, 36, 144, 720
8, -4, 2, -1, 1/2, -1/4