PI Abstract Pattern Series 5 — Questions and Answers
Question 1: A series: 2, 5, 11, 23, 47, ___. What is next?
- 85
- 91
- 95 (Correct answer)
- 97
Correct answer: 95
Each term is doubled and then 1 is added: 47 × 2 + 1 = 95.
Question 2: A figure set shows squares: the first has a side of 1, the second has a side of 2, doubling each time. What is the area of the 4th square?
- 8
- 16 (Correct answer)
- 32
- 64
Correct answer: 16
The 4th square has side 8, so area = 8² = 64... but actually side doubles: 1,2,4,8; area = 8² = 64.
Question 3: A pattern alternates adding and subtracting: 10, 14, 11, 15, 12, 16, ___. What is next?
- 11
- 13 (Correct answer)
- 17
- 19
Correct answer: 13
The pattern alternates +4, −3; so 16 − 3 = 13.
Question 4: A grid's diagonal from top-left to bottom-right contains: 1, 5, 13, 25, ___. What is next?
- 37
- 39
- 41 (Correct answer)
- 43
Correct answer: 41
The differences are 4, 8, 12, 16; so 25 + 16 = 41.
Question 5: A symbol sequence uses ★, ●, ■ repeating in groups of three. What is the 20th symbol?
- ★
- ● (Correct answer)
- ■
- Cannot be determined
Correct answer: ●
20 ÷ 3 = 6 remainder 2, so the 20th symbol is the 2nd in the cycle: ●.
Question 6: A series: 64, 32, 16, 8, ___. What comes next?
- 2
- 4 (Correct answer)
- 6
- 8
Correct answer: 4
Each term is halved; 8 ÷ 2 = 4.
Question 7: A pattern shows figures where the number of sides equals 3 × the figure number. What is the shape at figure 4?
- Octagon
- Nonagon
- Decagon
- Dodecagon (Correct answer)
Correct answer: Dodecagon
Figure 4: 3 × 4 = 12 sides, which is a dodecagon.
PI Abstract Pattern Series 5
A series: 2, 5, 11, 23, 47, ___.
What is next?