1000+ Citigroup Aptitude Test Questions and Answers Pdf - 1

Question: 1

If x + y = 15 and xy = 56, then what is the value of
x² + y²?

(A) 110

(B) 112

(D) 118

Ans: C

(x² + y²) = (x + y)² - 2xy = (15)² - 2 × 56

= (225 - 112) = 113.

Question: 2

Both addition and multiplication of numbers are operations which are

(A) commutative and associative

(B) commutative but not associative

(D) neither commutative nor associative

Ans: A

Both addition and multiplication of numbers are commutative and associative.

Question: 3

$$√2$$ is a/an

(A) irrational number

(B) natural number

(D) rational number

Ans: A

Since $$√2$$ is a non terminating and non repeating decimal, so it is an irrational number.

Question: 4

2 – 2 + 2 – 2 + ……. 101 terms = ?

(A) 0

(B) 2

(D) none of these

Ans: B

The given series is such that the sum of first hundred terms is zero, and 101^st term is 2. So, the sum of 101 terms is 2.

Question: 5

The number of Π is

(A) a rational number

(B) an irrational number

(D) a fraction

Ans: B

Clearly, Π is an irrational number.

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