RBC Abstract and Logical Patterns 4 — Questions and Answers
Question 1: A pattern of letters reads: A, C, E, G, ___. What letter comes next?
- H
- I (Correct answer)
- J
- K
Correct answer: I
The sequence skips every other letter (A, C, E, G, I), so the next letter is I.
Question 2: Each row in a table sums to the same total. Row 1: 4, 7, 9. Row 2: 6, 5, 9. What must the missing value in row 3 be if row 3 starts with 8, 3, ___?
- 9 (Correct answer)
- 10
- 7
- 11
Correct answer: 9
Each row sums to 20, so the missing value is 20 − 8 − 3 = 9.
Question 3: A shape sequence shows increasing complexity: 1 line, 3 lines, 6 lines, 10 lines, ___. What is the next term?
- 14
- 15 (Correct answer)
- 16
- 12
Correct answer: 15
The differences are +2, +3, +4, +5, so the next term is 10 + 5 = 15.
Question 4: In an analogy: ■■□ is to ■□■ as ●●○ is to ___.
- ○●○
- ●○● (Correct answer)
- ○○●
- ●●○
Correct answer: ●○●
The transformation moves the middle element to the end: ■■□ → ■□■ means the second position swaps with the third, giving ●○●.
Question 5: A clock face is used as a pattern grid. The minute hand moves +15 minutes each step: 12, 3, 6, ___. What position comes next?
- 9 (Correct answer)
- 12
- 6
- 1
Correct answer: 9
Adding 15 minutes each time: 12 o'clock → 3 → 6 → 9.
Question 6: A logical set rule states: all members of set X are in set Y, and no members of set Z are in set Y. Which statement must be true?
- Some X members are in Z
- No X members are in Z (Correct answer)
- All Z members are in X
- Some Z members are in Y
Correct answer: No X members are in Z
Since all X ⊆ Y and Z ∩ Y = ∅, it follows that X and Z share no members.
Question 7: A pattern divides a square into smaller squares. Step 1: 1 square. Step 2: 4 squares. Step 3: 9 squares. What is step 5?
- 16
- 20
- 25 (Correct answer)
- 36
Correct answer: 25
The number of squares at step n is n², so step 5 = 5² = 25.
RBC Abstract and Logical Patterns 4
A pattern of letters reads: A, C, E, G, ___.
What letter comes next?