GCF
Computation
Lowest Terms
Time
Extra
100

The GCF of 9 and 36

9

100

31 X 5

155

100

5/20

1/4

100

The number of minutes in six hours

360

100

The number of inches in three feet

36

200

The GCF of 8 and 12

4

200

136 divided by 4

34

200

8/18

4/9

200

One-fifth of one hour

12 minutes

200

Ten percent of 400

40

300

The GCF of 6 and 15

3

300

431 + 319

750

300

9/24

3/8

300

The number of hours in one week

168

300

Half of 516

258

400

The GCF of 10 and 35

5

400

782 - 427

355

400

16/40

2/5

400

Three quarters of an hour

45 minutes

400

The product of these two consecutive numbers is 72. What are the numbers?

8 and 9

500

The GCF of 13 and 39

13

500

41 X 6

246

500

12/42

2/7

500

The elapsed time from 8:30 a.m. until 2:45 p.m.

Six hours and 15 minutes

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