mathematical operation Model Questions & Answers, Practice Test for ssc chsl tier 1 2023

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)

Answer: (d)

Using the proper notations in(d),

we get

8 × 8 + 8 ÷ 8 – 8 = 8 × 8 + 1 – 8 = 64 + 1 – 8 = 57

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

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.

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.