Sawaal
4
Q:

 (3x + 2) (2x - 5) = ax² + kx + n .

What is the value of a - n + k ?

A) 5 B) 8
C) 9 D) 10

Answer:   A) 5



Explanation:

This is a quadratic equation. To find n we multiply the last terms in each bracket together (2 times -5) = -10

To find ‘a’ we multiply the first terms in each bracket together (3x times 2x) = 6x2, So a = 6.

Thus a - n = 16

To find k we multiply the first term in the first bracket by the second term in the second bracket and add the result to the product of the second term in the first bracket and the first term in the second. (-15x + 4x) = -11x. So k = -11

16 - 11 = 5

Subject: Problems on Numbers
Exam Prep: GRE
Related Questions
Q:

Find the greatest number among 213, 312, 1, 516

A) 213 B) 312
C) 1 D) 516
 
Answer & Explanation Answer: B) 312

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Problems on Numbers
Exam Prep: Bank Exams

0 834
Q:

Find the number that is as much greater than 39 as is less than 79.

A) 42 B) 49
C) 55 D) 59
 
Answer & Explanation Answer: D) 59

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Problems on Numbers
Exam Prep: Bank Exams

0 788
Q:

A number is divided by 52, we get 27 as remainder. On dividing the same number by 13, what will be the remainder?

A) 2 B) 7
C) 1 D) None
 
Answer & Explanation Answer: C) 1

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Problems on Numbers
Exam Prep: Bank Exams , CAT

0 1310
Q:

Find the smallest 8 digit number which is exactly divisible by 121.

A) 10000045 B) 10000076
C) 10000024 D) 10000055
 
Answer & Explanation Answer: A) 10000045

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Problems on Numbers
Exam Prep: Bank Exams , CAT

0 1001
Q:

What will be the value of a3+b3, if a2+b2=32 and a+b=8 ?

A) 8 B) 32
C) 128 D) 256
 
Answer & Explanation Answer: C) 128

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Problems on Numbers
Exam Prep: Bank Exams , CAT

0 750
Q:

Find the unit place digit in 71 x 72 x 73 x 74 x 76 x 77 x 78 x 79.

A) 2 B) 0
C) 4 D) 6
 
Answer & Explanation Answer: D) 6

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Problems on Numbers
Exam Prep: Bank Exams

1 1281
Q:

What is the place value and face value of 9 in 68956 respectively?

A) 9, 900 B) 900, 9
C) 9, 9 D) 9000, 900
 
Answer & Explanation Answer: B) 900, 9

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Problems on Numbers
Exam Prep: Bank Exams

0 918
Q:

7/15 of 5/3 of a number is greater than 7/9 of 3/5 of the same number by 9. Find the quadruple of the number.

A) 115.72 B) 114.72
C) 113.72 D) 112.72
 
Answer & Explanation Answer: A) 115.72

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Problems on Numbers
Exam Prep: Bank Exams , CAT

0 1080