Mathematical Operation Model Questions & Answers, Practice Test for ssc chsl tier 1 2023
ssc chsl tier 1 2023 SYLLABUS WISE SUBJECTS MCQs
Analogy
Classification Odd Man Out
Series Completion
Coding & Decoding
Blood Relation
Venn Diagrams
Puzzles Test
Mathematical Operation
Seating Arrangement
If A + D = B + C, A + E = C + D, 2C < A + E and 2A > B + D, then
Answer: (a)
2 C < A + E, A + E = C + D
⇒ 2C < C + D ⇒ C < D .........(1)
A + D = B + C, C < D ⇒ A < B .........(2)
2A > B + D, A < B ⇒ A > D ..........(3)
A + E = C + D , A > D ⇒ E < C ...........(4)
If P denotes +, Q denotes –, R denotes × and S denotes ÷, which of the following statements is correct?
Answer: (d)
Using the proper notations in(d),
we get
8 × 8 + 8 ÷ 8 – 8 = 8 × 8 + 1 – 8 = 64 + 1 – 8 = 57
The letters L, M, N, O, P, R, S and T in their order are substituted by nine integers 1 to 9 but not in that order. 4 is assigned to P. The difference between P and T is 5. The difference between N and T is 3. What is the integer assigned to N?
Answer: (b)
P = 4
Difference between P and T = 5
Hence, T is assigned = 9
Difference between N and T = 3
Hence, N is assigned = 6
Directions:
In the following questions, the symbols @ £ $ % and # are used with the following meanings as illustrated below :
- 'A $ B' means ' A is not smaller than B'
- 'A # B' means 'A' is not smaller than B'
- 'A@ B' means 'A is neither smaller than nor equal to B'
- 'A £ B' means 'A is equal to B'
- 'A % B' means 'A' is neither greater than nor equal to B'
Clearly, we have
- A $ B ⇒ A < B ⇒ A ≥ B
- A # B ⇒ A > B ⇒ A ≤ B.
- A @ B ⇒ A < B and A # B ⇒ A > B,
- A £ B ⇒ A > B and A # B ⇒ A < B.
Statements :
H % J,
J £ N,
N @ R
Conclusions :
- R % J
- H @ J
- N @ H
Answer: (d)
Given statements : H < J, J = N, N > R.
I. Relation between R and J
R < N, N = J ⇒ R < N = J ⇒ R < J i.e, R % J
II. Relation between H and J : H < J i.e, H % J.
III. Relation between N and H.
N = J, J > H ⇒ N = J > H ⇒ N > H i.e, N @ H.
So , only I and III are true.
Statements :
M @ J,
J $ T,
T £ N
Conclusion :
- N # J
- T % M
- M @ N
Answer: (d)
Given statements : M > J, J ≥ T, T = N
I. Relation between T and M
N = T, T ≤ J ⇒ N = T ≤ J ⇒ N > H i.e, N @ J.
II. Relation between T and M
T ≤ J , J < M ⇒ N = J < M ⇒ T < M i.e, T % M
III. Relation between M and N.
M > J, J ≥ T, T = N ⇒ M > J ≥ T = N ⇒ M > N i.e, M @ N.
Thus all I, II and III are true.
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