1
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0
The digits of a three-digit number taken in an order are in geometric progression. If one is added to the middle digit, they form an arithmetic progression. If 594 is subtracted from the number, then a new number with the same digits in reverse order is formed. The original number is divisible by
A
19
B
11
C
421
D
4
2
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0
The least value of ' $a$ ' such that the function $x^2+a x+1$ is increasing on $[1,2]$ is
A
4
B
2
C
$-$2
D
1
3
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0
Three fair dice are thrown. What is the probability of getting a total of 15 given that they exhibit three different numbers that are in arithmetic progression?
A
$\frac{1}{8}$
B
$\frac{1}{6}$
C
$\frac{1}{4}$
D
$\frac{1}{2}$
4
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0
The variance of 25 observations is 8 . If each observation is multiplied by 3 , then the new variance of the resulting observations is
A
8
B
$\frac{8}{9}$
C
24
D
72
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