1. Look at this series: 7, 10, 8, 11, 9, 12, ... What number should come next?
A. 7
B. 10
C. 12
D. 13
E. 20
2. Look carefully for the pattern, and then choose which pair of numbers comes next.
28 25 5 21 18 5 14
A. 11 5
B. 10 7
C. 11 8
D. 5 10
E. 10 5
3. Look at this series: F2, __, D8, C16, B32, ... What number should fill the blank?
A. A16
B. G4
C. E4
D. E3
E. G8
4. If A + B means A is the brother of B; A - B means A is the sister of B and A x B means A is the father of B. Which of the following means that C is the son of M?
A. M - N x C + F
B. F - C + N x M
C. N + M - F x C
D. M x N - C + F
E. M - N + C + F
5. Introducing a boy, a girl said, "He is the son of the daughter of the father of my uncle." How is the boy related to the girl?
A. Brother
B. Nephew
C. Uncle
D. Son-in-law
E. Father
Answers and Explanations
1. Answer - Option B
Explanation -
This is a simple alternating addition and subtraction series. In the first pattern, 3 is added; in the second, 2 is subtracted.
2. Answer - Option A
Explanation -
This is an alternating subtraction series with the interpolation of a random number, 5, as every third number. In the subtraction series, 3 is subtracted, then 4, then 3, and so on.
3. Answer - Option C
Explanation -
The letters decrease by 1; the numbers are multiplied by 2.
4. Answer - Option D
Explanation -
M x N → M is the father of N
N - C → N is the sister of C
and C + F → C is the brother of F.
Hence, M is the father of C or C is the son of M.
5. Answer - Option A
Explanation -
The father of the boy's uncle → the grandfather of the boy and daughter of the grandfather → sister of father.