Computer Aptitude

Results

#1. Which of the following is least like the others?

Cube

Sphere

Pyramid

Circle

SOLUTION & LOGIC

Correct Answer: Circle

A Circle is a two-dimensional (2D) planar figure with zero depth. In contrast, a Cube, Sphere, and Pyramid are all three-dimensional (3D) solid geometric objects that occupy physical volume.

#2. Together Brian and Fred bought 33 marbles. Brian bought 3 less than twice as much as Fred bought. How many marbles did Brian buy?

SOLUTION & ALGEBRAIC PROOF

Correct Answer: 21

Let F represent Fred’s marbles and B represent Brian’s marbles.

1) B + F = 33

2) B = 2F − 3

3) (2F − 3) + F = 33 ⇒ 3F − 3 = 33 ⇒ 3F = 36 ⇒ F = 12

4) B = 2(12) − 3 ⇒ B = 21

Brian bought 21 marbles and Fred bought 12 marbles.

#3. Consider the above flow chart for a customer, the person in No.1 is:

Married, with children

Married, with at least one son

Unmarried, with at least one daughter

Unmarried, with at least one son

Unmarried, with no children

SOLUTION & PATH TRACING

Correct Answer: Unmarried, with at least one son

Following the highlighted blue path from START to terminal node 1:

• “Is married?” ⇒ [NO] (Person is Unmarried)

• “Has children?” ⇒ [YES] (Person has Children)

• “Is a child male?” ⇒ [YES] (Person has at least one Son)

#4. Language Series Check

Consider a language which uses the following set of characters:

Small set: { a, b, c }

Large set: { A, B, C }

Punctuation set: { x, y }

This language must follow the following rules:

1. A punctuation character must end all series.

2. A series can have up to but no more than 4 characters, including punctuation characters.

Does the following series follow all the rules of the language defined above?

Series: `axBy`

Yes

SOLUTION & VALIDATION

Correct Answer: Yes

Rule 1 Verified: The string ends with y, which belongs to the Punctuation set {x, y}.
Rule 2 Verified: The series contains exactly 4 characters (a, x, B, y), satisfying the limit of “up to 4 characters”.

#5. Consider the following series: 3, 4, 6, 9, 13, ____ What comes next?

SOLUTION & SEQUENCE PROOF

Correct Answer: 18

The difference between consecutive terms increases by +1 at each step:

3 (+1) ⇒ 4 (+2) ⇒ 6 (+3) ⇒ 9 (+4) ⇒ 13 (+5) ⇒ 18

Finish