1
COMEDK 2026 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

If the matrix $M=\left[\begin{array}{ccc}x+5 & a & -4 \\ -2 & 0 & b \\ c & 6 & y+1\end{array}\right]$ is a skew symmetric matrix, the value of the expression $\boldsymbol{a} \boldsymbol{b}+\boldsymbol{c}^{\mathbf{2}}-\boldsymbol{x} \boldsymbol{y}$ is:

A

$-33$

B

$-9$

C

$0$

D

$-1$

2
COMEDK 2026 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

If $\boldsymbol{k}$ is the arithmetic mean of two given quantities and $\boldsymbol{p}, \boldsymbol{q}$ are the geometric means between the same two quantities, then $\boldsymbol{p}^{\mathbf{3}}+\boldsymbol{q}^{\mathbf{3}}$ is:

A

$2 k p q$

B

$2 k \sqrt{p q}$

C

$2 k(p+q)$

D

$\frac{2 k}{p q}$

3
COMEDK 2026 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

The feasible region represented by the constraints:

$$ \begin{aligned} & x+2 y \leq 120 \\ & x+y \geq 60 \\ & x-2 y \geq 0 \\ & x \geq 0 \text { and } y \geq 0 \end{aligned} $$

COMEDK 2026 Afternoon Shift Mathematics - Linear Programming Question 1 English
A

A

B

C

C

B

D

D

4
COMEDK 2026 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

$$ \text { The range of the relation } R=\left\{(x, y): y=x+\frac{6}{x} \text {; where } x, y \in \mathbb{N} \text { and } x<6\right\} \text { is: } $$

A

$\{1,2,3\}$

B

$\{5,6\}$

C

$\left\{5, \frac{11}{2}\right\}$

D

$\{5,7\}$