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Weekly QuizDemonstrate a fearless pursuit of *auk*ademic*auk*cellence by plunging, head-first of course, into these questions. Return every week for a new quiz on another of the 14,000 topics in the Knowledge Master Library.

**Numbers**(Click on the question number for the answer.) 1. B **Integers**

Which is an integer?

A. pi

B. 396

C. 1.007

D. 12 14/15

E. 6.02 times 10 to the fifth power

2. first, second, third **Ordinary Numbers**

What are the first three ordinal numbers?

3. D **Real Ratios**

Real numbers which cannot be expressed as the ratio of two integers are classified as ...

A. prime numbers

B. composite numbers

C. deficient numbers

D. irrational numbers

E. denominate numbers

4. B **Palindrome Numbers**

The odometer on Bill's truck reads 93884. What is the fewest number of miles he must drive before the numbers on his odometer form a palindrome?

A. 9

B. 55

C. 109

D. 165

E. 232

5. exponent **Powerful Numbers**

What is the name for a numeral that tells how many times to use a number called the base as a factor in a product?

6. E **Decimal Points**

Begin at the decimal point and move 5 places left. Then move 3 places right and 1 place left. Finally move 8 places right. You are now in what place?

A. tenths

B. hundredths

C. millionths

D. ten thousandths

E. hundred thousandths

7. B **Number History**

The numerals you use today were developed by what civilization?

A. Roman

B. Arab

C. Mayan

D. Greek

E. English

8. 6 to the second power **Exponents**

Express the answer to the following in simplified exponential form.- 6 to the second power times 6

to the sixth power times 6 to the

negative sixth power.

9. B **Combinations**

How many integers greater than 100 can be written using just 0, 4, and 7 if no digit is repeated in any number?

A. 3

B. 4

C. 5

D. 6

E. 7

10. D **Perfection**

Which number is not a perfect square?

A. 25

B. 49

C. 81

D. 102

E. 121

11. odd **Square Rules**

If a whole number is even, its square is even. If a whole number is odd, its square is ...

12. C **Abundant Numbers**

Ancient Greeks said a number is abundant if the sum of its divisors excluding itself is greater than itself. Which number below is abundant?

A. 4

B. 8

C. 12

D. 15

E. 16

13. B **Even****Integers**

How many four-digit, positive even numbers are there?

A. 4000

B. 4500

C. 5000

D. 5500

E. 6000

14. D **Place Holders**

How many zeroes are there in the number representing the sum of one trillion and one hundred?

A. 8

B. 9

C. 10

D. 11

E. 12

15. 9 **Number Pairs**

If you use the integers from 1 through 8 to form pairs of numbers so that the sum of each pair is identical, what would that sum be?

16. A **Equivalence**

Which is not equal to the others?

A. .15

B. .015

C. 1.5%

D. 1 1/2%

E. 15/1000

17. A **Big Numbers**

What number equals to one thousand billion?

A. trillion

B. quadrillion

C. quintillion

D. sextillion

E. septillion

18. zero **History of Math**

In the ninth century A.D., the Hindus added what new element to the set of natural numbers?

19. 1961 **Unusual Numbers**

What year in the 20th century reads the same when printed upside down and backwards?

20. D **Number Comparisons**

Which choice is largest given this expression?- -1 < P < 0

A. 0

B. 2P

C. -1

D. P + 1

E. P cubed

21. pi (3.141592...) **Mnemonic Devices**

This jingle helps you remember what number?- See - I have a rhyme assisting my feeble
- brain - its tasks ofttimes resisting.

22. B **Conditions**

(x+1)/(x+1) = 1 if and only if ...

A. x is not prime

B. x does not equal -1

C. x is not less than 1

D. x does not equal zero

E. x is a positive number

23. 3 **Prime Place Value**

How many prime numbers less than 40 have a 3 in the one's place?

24. one **Special Numbers**

What number when doubled equals twice as much as when squared?

25. D **Number Savvy**

Which is an irrational number?

A. 688/4

B. -39127

C. 9 to the 11th power

D. the square root of 2

E. 5 to the negative 2 power

26. 9 **Number Properties**

Rearrange the digits in any whole number any way you want. The difference between the original number and the new number will always be divisible by what number greater than 1?

27. 6 **Number History**

Because it is the sum of all its divisors except itself, what single-digit number did the Greeks consider to be the first perfect number?

28. C **Triangular Numbers**

The numbers 3 and 6 are triangular numbers because sets of 3 and 6 members can be arranged in triangles. Which of these is not triangular?

A. 28

B. 10

C. 16

D. 21

E. 36

29. 2 **Integers**

What integer has these properties?- It is positive.

It is prime.

Its square is less than 10.

It is even.

Its square root is less than 4.

30. B **Infinity**

Which number is not finite?

A. the stars in our solar system

B. the fractions between 1 and 2

C. the number of insects in Brazil

D. the odd integers less than 1000

E. the ounces of ice in Antarctica

- Top of page

**Answers to Numbers**- 1. B
- 2. first, second, third
- 3. D
- 4. B
- 5. exponent
- 6. E
- 7. B
- 8. 6 to the second power
- 9. B
- 10. D
- 11. odd
- 12. C
- 13. B
- 14. D
- 15. 9
- 16. A
- 17. A
- 18. zero
- 19. 1961
- 20. D
- 21. pi (3.141592...)
- 22. B
- 23. 3
- 24. one
- 25. D
- 26. 9
- 27. 6
- 28. C
- 29. 2
- 30. B
- Top of page