Mathematics
Average / Arithmetic Mean
The average of x−6, x−2, x+2, and x+6 is 19. What is x?
A. 21
B. 19
C. 23
D. 17
Correct Answer: B
The offsets sum to zero, so the average of the four expressions equals x.
Mathematics
Average / Arithmetic Mean
The average of x−6, x−2, x+2, and x+6 is 18. What is x?
A. 22
B. 20
C. 16
D. 18
Correct Answer: D
The offsets sum to zero, so the average of the four expressions equals x.
Mathematics
Average / Arithmetic Mean
The average of x−6, x−2, x+2, and x+6 is 17. What is x?
A. 21
B. 17
C. 15
D. 19
Correct Answer: B
The offsets sum to zero, so the average of the four expressions equals x.
Mathematics
Average / Arithmetic Mean
The average of x−6, x−2, x+2, and x+6 is 16. What is x?
A. 20
B. 14
C. 18
D. 16
Correct Answer: D
The offsets sum to zero, so the average of the four expressions equals x.
Mathematics
Average / Arithmetic Mean
The average of x−6, x−2, x+2, and x+6 is 15. What is x?
A. 15
B. 13
C. 17
D. 19
Correct Answer: A
The offsets sum to zero, so the average of the four expressions equals x.
Mathematics
Average / Arithmetic Mean
The average of x−6, x−2, x+2, and x+6 is 14. What is x?
A. 18
B. 16
C. 14
D. 12
Correct Answer: C
The offsets sum to zero, so the average of the four expressions equals x.
Mathematics
Average / Arithmetic Mean
The average of x−6, x−2, x+2, and x+6 is 13. What is x?
A. 15
B. 11
C. 17
D. 13
Correct Answer: D
The offsets sum to zero, so the average of the four expressions equals x.
Mathematics
Average / Arithmetic Mean
The average of x−6, x−2, x+2, and x+6 is 12. What is x?
A. 14
B. 10
C. 12
D. 16
Correct Answer: C
The offsets sum to zero, so the average of the four expressions equals x.
Mathematics
Average / Arithmetic Mean
The average of x−6, x−2, x+2, and x+6 is 11. What is x?
A. 13
B. 11
C. 15
D. 9
Correct Answer: B
The offsets sum to zero, so the average of the four expressions equals x.
Mathematics
Average / Arithmetic Mean
The average of x−6, x−2, x+2, and x+6 is 10. What is x?
A. 10
B. 8
C. 12
D. 14
Correct Answer: A
The offsets sum to zero, so the average of the four expressions equals x.
Mathematics
Average / Arithmetic Mean
What is the average of the first 19 even positive integers?
A. 20
B. 18
C. 22
D. 24
Correct Answer: A
Average = (2+38)/2 = 20.
Mathematics
Average / Arithmetic Mean
What is the average of the first 18 odd positive integers?
A. 18
B. 22
C. 16
D. 20
Correct Answer: A
Average = (1+35)/2 = 18.
Mathematics
Average / Arithmetic Mean
What is the average of the first 17 even positive integers?
A. 20
B. 18
C. 22
D. 16
Correct Answer: B
Average = (2+34)/2 = 18.
Mathematics
Average / Arithmetic Mean
What is the average of the first 16 odd positive integers?
A. 14
B. 16
C. 20
D. 18
Correct Answer: B
Average = (1+31)/2 = 16.
Mathematics
Average / Arithmetic Mean
What is the average of the first 15 even positive integers?
A. 18
B. 16
C. 14
D. 20
Correct Answer: B
Average = (2+30)/2 = 16.
Mathematics
Average / Arithmetic Mean
What is the average of the first 14 odd positive integers?
A. 12
B. 14
C. 18
D. 16
Correct Answer: B
Average = (1+27)/2 = 14.
Mathematics
Average / Arithmetic Mean
What is the average of the first 13 even positive integers?
A. 16
B. 12
C. 14
D. 18
Correct Answer: C
Average = (2+26)/2 = 14.
Mathematics
Average / Arithmetic Mean
What is the average of the first 12 odd positive integers?
A. 14
B. 10
C. 16
D. 12
Correct Answer: D
Average = (1+23)/2 = 12.
Mathematics
Average / Arithmetic Mean
What is the average of the first 11 even positive integers?
A. 12
B. 16
C. 14
D. 10
Correct Answer: A
Average = (2+22)/2 = 12.
Mathematics
Average / Arithmetic Mean
What is the average of the first 10 odd positive integers?
A. 14
B. 10
C. 8
D. 12
Correct Answer: B
Average = (1+19)/2 = 10.