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7th Grade ABC Math a Thon
供稿人: Lefebvre
  • 1. 83 + 83 + 83 + 17 + 17 + 17 + 17 =
A) 383
B) 300
C) 400
D) 317
  • 2. If the average of two numbers is 7, the numbers could be
A) 2 and 14
B) 1 and 8
C) 3 and 4
D) 6 and 8
  • 3. Which of the following is an even number?
A) 666 - 555
B) 666 ÷ 222
C) 666 x 333
D) 666 + 777
  • 4. (0 x 1) + (0 x 2) + (0 x 3) + (0 x 4) =
A) 10
B) 0
C) 25
D) 24
  • 5. Find the degree measure of one angle of a square.
A) 100°
B) 360°
C) 90°
D) 4°
  • 6. 88,888 - 9,999 =
A) 77,889
B) 78,889
C) 11,111
D) 79,999
  • 7. The product of two whole numbers is 66. The largest that one of these numbers could possibly be is
A) 33
B) 11
C) 22
D) 66
  • 8. Find the missing number:
    14 x 15 x 16 = 28 x 30 x ?
A) 2
B) 4
C) 8
D) 32
  • 9. Round 5499 to the nearest thousand.
A) 5000
B) 5500
C) 5400
D) 6000
  • 10. 11 + 12 + 13 + 14 =
A) 50
B) 4
C) 10
D) 14
  • 11. From 3 x 5 x 7, subtract 3 x 5.
    The result is:
A) 3 x 5 x 7
B) 7
C) 3 x 5 x 1
D) 3 x 5 x 6
  • 12. What percent of the value of a quarter is the value of a dime?
A) 40%
B) 250%
C) 2/5%
D) 10%
  • 13. (5 x 10) + (7 x 1) + (4 x 1000) + (3 x 100) =
A) 3457
B) 4357
C) 4537
D) 5743
  • 14. Jill is now 14 years old. Jack is now 6 years older than Jill was 2 years ago.
    How old is Jack now?
A) 18
B) 22
C) 10
D) 20
  • 15. The average of 99, 97, 95, 93, and 91 is
A) 95
B) 94
C) 94.5
D) 95.5
  • 16. In the diagram, there is an equilateral triangle and a square. If the perimeter of the triangle is 24, find the perimeter of the square.
A) 32
B) 96
C) 40
D) 24
  • 17. 294 equals each of the following EXCEPT
A) (1 x 100) + (19 x 10) + 4
B) (1 x 100) + (9 x 10) + 104
C) (2 x 100) + (9 x 10) + 4
D) (2 x 100) + (9 x 10) + 14
  • 18. How many whole numbers are greater than 777 and less than 888?
A) 109
B) 100
C) 111
D) 110
  • 19. 11 is a factor of
A) 111
B) 1
C) 111,111
D) 11,111
  • 20. 290 days is most nearly equal to
A) 288 days
B) 41 weeks
C) 1 year
D) 9 months
  • 21. 5 x 2 x 5 x 2 x 5 x 2 x 5 x 2 x 5 x 2 =
A) 10,000
B) 100,000
C) 50
D) 50,000
  • 22. Half the sum of two numbers is 20. If one of the numbers is 7, the other number is
A) 13
B) 26
C) 33
D) 3
  • 23. A boy has 100 nickels, 100 dimes, and 100 quarters. He has
A) $39
B) $34
C) $75
D) $40
  • 24.
A) 6
B) 12
C) 13
D) 10
  • 25. I was paid $1 on the first day, and my salary doubled each day thereafter. In total, how much did I earn in the first 7 days?
A) $128
B) $127
C) $63
D) $64
  • 26. Find the ones' digit of the difference of 72 - 62.
A) 4
B) 1
C) 3
D) 2
  • 27. 10 - 9 + 9 - 8 + 8 - 7 + 7 - 6 + 6 - 5 + 5 - 4 + 4 - 3 + 3 =
A) 1
B) 10
C) 0
D) 7
  • 28. When 1 is divided by 1/2, the quotient is
A) 1/2
B) 1 1/2
C) 2
D) 1
  • 29. The square root of the square root of 16 is
A) 4
B) 2
C) 16
D) 64
  • 30. Which of the following is divisible by 2, 3, 4, and 5?
A) 2001
B) 2100
C) 2010
D) 2110
  • 31. Al, Bob, and Carl together spent $24, of which half was spent by Al and one-third was spent by Bob.
    How much did Carl spend?
A) $20
B) $4
C) $8
D) $6
  • 32. The perimeter of a square is 4. The area of the square is
A) 1
B) 4
C) 2
D) 16
  • 33. Find the largest prime factor of
    30 x 40 x 50
A) 3
B) 10
C) 5
D) 50
  • 34. Increasing $100 by a certain percent produces the same result as decreasing $300 by the same percent. The percent is
A) 200%
B) 50%
C) 150%
D) 100%
  • 35. In the correct addition above, A, B, and C are 3 different non-zero digits. Find the value of C
A) 8
B) 1
C) 7
D) 9
  • 36. Think of the largest whole number less than 10,000 whose digits are all different. What is the ones' digit of this number?
A) 8
B) 9
C) 7
D) 6
  • 37. If 3 tics = 4 tacs, and 2 tacs = 3 toes, then 1 toe =
A) 2 tics
B) 1/6 tic
C) 1/2 tic
D) 6 tics
  • 38. When the last 3 digits of a year (such as 1987) are consecutive digits written in descending order, we'll call the year a descending year. A descending year will next occur in the
A) 26th century
B) 24th century
C) 23rd century
D) 25th century
  • 39. A circle has an area of 36π. What is the area of the smallest square that can surround this circle?
A) 144
B) 36
C) 18
D) 72
  • 40. All the whole numbers with a first digit of 2 are written in increasing order. The list begins with 2, 20, 21, 22, ... Find the 1000th digit thus written
A) 9
B) 7
C) 6
D) 8
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