8 Blood Relations (Reasoning) questions asked in DSSSB TGT / PGT previous year papers, each with the correct answer and explanation. Read them free on UTpaper, or attempt the full papers as timed online tests.
If A + B means A is the brother of B, A − B means A is the sister of B and A × B means A is the father of B, then how is P related to S in the expression 'P × Q − R + S'?
AP is the father of S
BP is the son of S
CP is the brother of S
DP is the uncle of S
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Correct answer: (A) P is the father of S
Explanation
P × Q: P is father of Q; Q − R: Q is sister of R; R + S: R is brother of S. Q, R and S are siblings, so P is the father of S.
Select the option with the second term related to the first term in the same way as the second term is related to the first term in the given pair.
MATTER : BNUUSF
AHOTELS: PIFTUM
BHOTELS PIFUTM
CHOTELS: PIFVMT
DHOTELS: PFIUTM
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Correct answer: (B) HOTELS PIFUTM
Explanation
MATTER: each letter +1 gives NBUUFS, then each pair of letters is swapped: BN UU SF. HOTELS +1 = IPUFMT, swapping pairs gives PIFUTM.
If
P # Q means P is the brother of Q,
P @ Q means P is the father of Q, and
P & Q means P is the sister of Q,
then how is A related to E in the expression A # B @ C & D # E?
APaternal uncle
BFather
CGrandfather
DMaternal uncle
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Correct answer: (A) Paternal uncle
Explanation
A is B's brother, B is C's father, C is D's sister, and D is E's brother. So C, D and E are B's children and A is the brother of E's father, which makes A E's paternal uncle.
Select that missing pair (Third number : Fourth number) which is related in the same
way as the first number is related to the second number and fifth number is related to
sixth number. (NOTE: Operations should be performed on the whole numbers, without
breaking down the numbers into its constituent digits. E.g.13 – Operations on 13 such
as adding /subtracting /multiplying etc. to 13 can be performed. Breaking down 13 into
1 and 3 and then performing mathematical operations on 1 and 3 is not allowed)
442 : 633 :: ? :: 186 : 377
A313 : 504
B518 : 719
C111 : 292
D277 : 467
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Correct answer: (A) 313 : 504
Explanation
In each pair the second number is the first plus 191: 442 + 191 = 633 and 186 + 191 = 377. Likewise 313 + 191 = 504.
If A + B means ‘A’ is the husband of ‘B’, A – B means ‘A’ is the wife of ‘B’, A × B means
‘A’ is the mother of ‘B’, A ÷ B means ‘A’ is the son of ‘B’. If J ÷ P + K × M – R, then How
is P related to R?
AHusband
BWife’s brother
CFather
DWife’s father
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Correct answer: (D) Wife’s father
Explanation
J ÷ P: J is son of P. P + K: P is husband of K. K × M: K is mother of M. M − R: M is wife of R. So P is the father of M, who is R's wife; P is R's wife's father.
Select the option that is related to the fifth number cluster in the same way as the
second number cluster is related to the first number cluster and fourth number
cluster is related to third number cluster.
6 : 180 :: 8 : 448 :: 10 : ?
A900
B990
C800
D999
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Correct answer: (A) 900
Explanation
The rule is n² × (n − 1): 6² × 5 = 180 and 8² × 7 = 448. So 10² × 9 = 900.
'X $ Y' means 'X is the wife of Y',
'X # Y' means 'X is the son of Y',
'X % Y' means 'X is the father of Y' and
'X @ Y' means 'X is the sister of Y'.
In 'M @ T # F % H', how is M related to H?
ABrother
BMother
CSister
DDaughter
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Correct answer: (C) Sister
Explanation
M is the sister of T, T is the son of F, and F is the father of H. So M is F's daughter and H is F's child, which makes M the sister of H.
Select the option where the second word is related to the first word in the same way as the second word is related to the first word in the given pair.
IMAGINE : BLJGFMJ
ACOLLEGE: NNDLFFF
BSUCCESS: DTTCTRE
CCOMMAND: NND.MENB
DFAILURE: JZFLFQV
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Correct answer: (A) COLLEGE: NNDLFFF
Explanation
Rule: reverse the first three letters and the last three letters, then apply +1, −1, +1 to each group, keeping the middle letter. COLLEGE gives COL → LOC → MND, L, EGE → FFF, i.e. MNDLFFF. The keyed option (A) follows this rule; its first letter appears to be a typo. The other options each break the rule.
How to use these DSSSB TGT / PGT Reasoning questions
Every question here was asked in a real DSSSB TGT / PGT paper; the paper and shift are shown on the card, and the number opens the question on its own page. Try each one before tapping Show answer, then attempt the full DSSSB TGT / PGT papers as timed tests to check your speed under exam conditions.