Directions(1–2): Following question contains two equations as I and II. You have to solve both equations and determine the relationship between them and give answer as.
1. I) 14x² – 5√15 x – 90 = 0
II) 6y² + √21 y – 21 = 0
A. x > y
B. x ≥ y
C. x = y or relationship cannot be determined
D. x < y
E. x ≤ y
2. I) 3x²– 13√2x + 24 = 0
II) y²– 4√2y + 6 = 0
A. x > y
B. x ≥ y
C. x = y or relationship cannot be determined
D. x < y
E. x ≤ y
3. Quantity I: ‘X’: The cost of 5 bags and 12 notes is Rs. 3100 and the cost of 7 bags and 18 notes is Rs. 4400. What is the cost of 3 notes?
Quantity II: ‘Y’: y²= 22500
A. Quantity II> Quantity I
B. Quantity II < Quantity I
C. Quantity I ≥ Quantity II
D. Quantity I ≤ Quantity II
E. Quantity I = Quantity II or No relation
Directions(4-5): What value should come in place of question mark (?) in the following number series?
4. 17, ? , 102, 408, 2040
A. 27
B. 52
C. 34
D. 68
E. 46
5. 480, 240, 160,? , 96, 80
A. 124
B. 138
C. 142
D. 120
E. 136
Answers and Explanations
1. Answer - Option C
Explanation -
I) 14x² - 5√15 x - 90=0
14x² - 12√15 x + 7√15 x – 90 = 0
2x(7x – 6√15)+ √15(7x – 6√15) = 0
(2x + √15)(7x – 6√15) = 0
x = -√15/2, (6√15)/7
II) 6y² + √21 y - 21=0
6y² + 3√21 y-2√21 y -21=0
3y(2y + √21)- √21(2y + √21)=0
(3y - √21)(2y + √21)=0
y = √21/3, -√21/2
Hence, relationship between x and y cannot be determined
2. Answer - Option C
Explanation -
I) 3x²– 13√2x + 24 = 0
3x² – 9√2x – 4√2x + 24 = 0
3x(x – 3√2) – 4√2 (x – 3√2) = 0
(3x – 4√2)(x – 3√2) = 0
x = 4√2/3, 3√2
II) y²– 4√2y + 6 = 0
y² – √2y – 3√2y + 6 = 0
y(y – √2) – 3√2 (y – √2) = 0
(y – √2) (y – 3√2) = 0
y = √2, 3√2
Hence, relationship between x and y cannot be determined
3. Answer - Option C
Explanation -
According to the question:
5b + 12n = 3100—– (i)
7b + 18n = 4400 —– (ii)
After solving equation (i) and (ii),
We get, b= 500 and n= 50
Cost of 3 notes = 50×3= 150
Quantity II:
y²= 22500
Y= ±150
4. Answer - Option C
Explanation -
The pattern is, *2, *3, *4, *5…
The answer is, 34
5. Answer - Option D
Explanation -
The pattern is, *1/2, *2/3, *3/4, *4/5, *5/6
The answer is, 120