GCF and Divisibility
Name one divisibility test for 3.
Sum digits; if the sum is divisible by 3, so is the number.
Write the ratio of 5 cats to 8 dogs in fraction form
5/8
Add and reduce if possible: 2/9 + 4/9 =
6/9 = 2/3
What do we call the distance around a circle?
Circumference
Multiply 2/3 x 3/4
6/12 = 1/2
Is 4 a factor of 1,024?
Yes, the last two digits 24 make a number divisible by 4.
Simplify the ratio 18 to 24
3/4
Subtract and reduce if possible: 7/10 - 3/10
4/10 = 2/5
If the radius is 7 cm, what is the diameter?
14 cm
Reduce 14/21
2/3
Find GCF(36, 60)
12
A runner goes 21 km in 3 hours. What is the average rate (km/h)?
7 km/h
Write 26/9 as a mixed number
4 5/6
Name the angle type for 35°
Find LCM(6, 15)
30
Find GCF(42, 70, 98)
14
A car uses 12 gallons for 330 miles. About how many mpg? (Round to nearest whole)
≈27.5 → 28 mpg.
3 5/8− 1 3/8=
2 2/8 = 2 1/4
Two lines form square corners. Name the relationship.
Perpendicular lines.
What is the reciprocal of 5/7?
7/5
Smallest 3-digit number divisible by 6 and 8?
Find common multiples. First 3-digit multiple is 120.
A recipe uses a sugar-to-flour ratio of 3:5. If you use 2 cups of sugar, how much flour keeps the ratio?
5/3 ×2 = 3 ⅓ cups
A hiker walked 4 2/3 mi in the morning and 2 5/6 mi in the afternoon. Total?
7 1/2 mi
Draw an angle that is obtuse and name one possible measure
Any angle that is more than 90° and less than 120°
A board is 5/6 m long. You cut off 1/3 of it. How much remains?
5/6 - 1/3 = 5/6 - 2/6 = 3/6 = 1/2