Logical Reasoning Questions for CLAT | QB Set 17

Read the passage carefully and answer the questions.

The symbols denote the following relationships:

• a + b means a is the sister of b
• a – b means a is the brother of b
• a × b means a is the daughter of b
• a ÷ b means a is the mother of b

1. Which of the following relationships shows that l and n are wife and husband?
(a) l ÷ m × n
(b) l – m × n
(c) l + m × n
(d) None of these

Answer: (a)
Explanation:
l ÷ m → l is the mother of m
m × n → m is the daughter of n
So, m is the daughter of both l and n.
This implies l and n are wife and husband. Hence, option (a) is correct.

2. How many females are shown in the following relationship?
l + m – n + o – p × q
(a) 2
(b) 3
(c) 4
(d) Can’t be determined

Answer: (d)
Explanation:
l + m → l is the sister of m (female)
m – n → m is the brother of n (male)
n + o → n is the sister of o (female)
o – p → o is the brother of p (male)
p × q → p is the daughter of q (female)

So, l, n, and p are confirmed females. m and o are males. The gender of q is not known.
Hence, we cannot determine the total number of females with certainty.
Correct option: (d)

3. What does the relationship p + q – r × s ÷ t show?
(a) p, q, r, s are children of t
(b) p, q, r, t are children of s
(c) p, q, r are children of t and s
(d) p, q, r, s, t are all siblings

Answer: (b)
Explanation:
p + q → p is the sister of q
q – r → q is the brother of r
r × s → r is the daughter of s
s ÷ t → s is the mother of t

So, r is daughter of s, s is mother of t ⇒ s is parent of t
Therefore, r and t are children of s.
From earlier: p and q are siblings, and related to r.
Hence, p, q, r, and t are children of s.
Correct option: (b)

4. What relationship does the symbol ‘+’ indicate?
(a) Brother
(b) Sister
(c) Mother
(d) Can’t be determined

Answer: (b)
Explanation:
According to the given code, a + b means a is the sister of b.
Hence, the correct answer is (b).