Large Numbers
Factors
Multiples
Prime Numbers
Small Numbers
100

Write the number for:

seven hundred million twenty three thousand twelve

700 023 012

100

The factors of 20.

What is 1, 2, 4, 5, 10, 20?

100

The NEXT 5 multiples of 40.

40, 80, 120, 160, 200, 240

100

List the prime numbers less than 20

2,3,5,7,9,11,13,17,19

100

Write the number for: twenty-five hundredths

0.25

200

One million less than
23 486 832 255

23 285 832 255

200

The factors of 21.

What is 1, 3, 7, 21?

200

The NEXT 5 multiples of 12.

12, 24, 36, 48, 60, 72

200

The SUM of the all the one digit prime numbers 

2+3+5+7=17

200

Write as a number:

Three hundred five thousandths

0.305

300

Write this number in words:

201 002 930 002

two hundred one BILLION two MILLION

nine hundred thirty THOUSAND two

300

The factors of 36.

What is 1, 2, 3, 4, 6, 9, 12, 18, 36?

300

The first 3 common multiples of 4 and 5

4,8,12,16,20

5,10,15,20

20, 40 and 60 are the common multiples


300

What are all the prime numbers between 30 and 40

31 and 37

300

Write in words:

2.0045

two and forty-five TEN THOUSANDTHS

400

Write in STANDARD form:

20 000 000 000 + 4 000 000 + 30 000 + 5

20 004 030 005

400

The COMMON FACTORS of 18 and 24?

18 - 1x18, 2x9, 3x6

24 - 1x24, 2x12, 3x8, 4x6

COMMON FACTORS are 2, 3, 6

400

The first 3 common multiples of 20 and 15  

20, 40, 60, 80

15, 30, 45, 60

60 is the 1st , so 120  and then 180

400

What are the PRIME FACTORS of 72

72 is 8x9 so the prime factors are 2x2x2x3x3

400

Write in words:

0.002 + 0.000 4 + 0.000 06

Two hundred forty-six HUNDRED THOUSANDTHS

500

Write in STANDARD form:

twenty-three TRILLION four MILLION Seven hundred fifty-six THOUSAND 

23 000 004 756 000

500

A common factor of the numbers 25 and 40.

25 - 1x25,  5x5

40 - 1x40, 2x20, 4x10, 5x8

Common Factor is 5

500

The first 5 common multiples of the numbers 8 and 12.

8, 16, 24,

12, 24 

24 is the 1st so 48, 72, 96, and 120

500

What are the PRIME FACTORS of 144

144 is 12x12 so 2 x 2 x 2 x 2 x 3 x 3

500

Write in word form 

2000 + 4 + 0.03 + 0.004

Two THOUSAND four AND thirty four THOUSANDTHS