1. 2012 MATH FIELD DAY MENTAL ARITHMETIC No Calculators No Pencil/Paper Computation There are 20 questions on the test. Each one will be flashed on the screen for 25 seconds and read aloud. At the end of this time, the monitor will say, “Write down your answer.” At this time you may pick up your pencil and write your answer. Then put your pencil back down. The first 15 problems are multiple answer. Be sure to write A, B, C, D, or E, not a number. The last 5 problems require a number.

2. 1. 80 is to 96 as what number is to 120? A. 64 B. 90 C. 100 D. 104 E. Not enough information is given

3. A. 531×42 B. 532×41 C. 541×32 D. 542×31 E. The products are all the same.

4. 3. Which number listed has an odd number of factors? A. 18 B. 27 C. 35 D. 49 E. 57

5. A. 2345 B. 23,456 C. 234,567 D. 2,345,678 E. 23,456,789

6. 5. Which number is closest to 1? A. B. C. D. E.

7. A. π : 4π B. π :4 C. 1:4 D. 1:2 E. Not enough information is given.

8. 7. Take 20 percent off of 20 percent of the quotient of 20 and the reciprocal of 20. The resulting number is A.0.16 B.4 C.16 D.40 E.64

9. A. 1s B. 10s C. 100s D. 1000s E. 10000s

10. 9. Find the sum of all the three digit numbers whose three digits are each one of 1, 3, and 6: A. 2000 B. 2110 C. 2220 D. 2440 E. 2550

11. 10. What is the sum of 1-2+3-4+5-6+7-…+17? A. -8 B. 0 C. 1 D. 8 E. 9

12. 11. Compute the quotient: 11. Compute the quotient: A. 2 B. 10 C. 24 D. 200 E. 1024

13. 12. A rectangular prism has width and length that are both 10 times the height. If the volume of the prism is 3000 cubic units, what is the height to the nearest whole number? A. 2 units B. 3 units C. 4 units D. 5 units E. 6 units

14. 13. France 211,207 mi 2 Spain 194,896 mi 2 Sweden 173,731 mi 2 Finland 130,119 mi 2 Norway 125,181 mi 2 Which statement is true? 13. France 211,207 mi 2 Spain 194,896 mi 2 Sweden 173,731 mi 2 Finland 130,119 mi 2 Norway 125,181 mi 2 Which statement is true? A. Sweden is less than 40,000 mi 2 larger than Finland. B. France is more than twice the size of Norway C. Spain is about 21,000 mi 2 larger than Sweden. D. France is more than 100,000 mi 2 larger than Norway. E. All statements are false.

15. 14. Select the one prime number. A. 213 B. 401 C. 171 D. 2001 E. 2013

16. 15. What is the next number in the sequence? 59, 81, 140, 221, 361, _____ A. 401 B. 409 C. 442 D. 541 E. 582

17. 16. Start with the number of pints in a gallon, multiply by the number of inches in a foot, subtract the number of letters in the alphabet, then divide by the number of digits in a zip code.

18. 17. Apples normally sell for $0.32 each. They go on sale 3 for $0.69 each. How much money is saved if you purchase 2 dozen apples while they are on sale?

19. 18. I am thinking of a number. If I divide by 13, then multiply by 12, then subtract 20 and finally add 89, I end up with 93. What was my original number?

20. 19. Start with the number 9876. Reverse the digits and subtract. Sort the digits from largest to smallest. What is the resulting number?