Factors
Multiples of 10
Elapsed Time
Challenge
100

List all the factors of 20.

1, 2, 4, 5, 10, 20

100

When I multiply by multiples of 10, I forget about the...

zero and add it at the end!

100

It is now 9:30. What time is 15 minutes later?

9:45

100

4 x 900

3600

200

Fill in the blank:

5 x 7 > 7 x _____

Any number less than 5

200

5 x 30

150

200

It is 12:15. What time is 30 minutes earlier?

11:45

200

What are the factors of 36?

1, 2, 3, 4, 6, 9, 12, 18, 36

300

List all the factors of 30.

1, 2, 3, 5, 6, 10, 15, 30

300

3 x 52

156

300

Softball practice starts at 3:30. It gets over at 5:15. How long is softball practice?

1 hour 45 minutes

300

It is 9:30 am. Dance practice starts at 1:45 pm. How long until dance practice starts?

4 hours 15 minutes

400

4 x 4 < 4 x ____

Any number greater than 4.

400

Six blue jays each have a mass of about 70 grams. What is their total mass?

420 grams

400

Soccer practice starts at 4:15. It lasts 1 hour and 25 minutes. What time is soccer practice over?

5:40

400

80 California condors have a combined mass of about 480 kilograms. What is the mass of one California condor?

7 kilograms

500

Factor times factor equals...

product!

500

Together, 90 great blue herons have a mass of about 360 kilograms. One California condor has a mass of about 9 kilograms. About how many 9-kilogram California condors would it take to equal the mass of the group of herons?

40 California condors

500

It starts raining at 6:40 and stops at 9:30. How long did it rain?

2 hours 50 minutes

500

What is Miss Vander Wilt's first name?

Johanna