Divisibility Rules
Is 36 divisible by 3? How do you know?
Yes - sum of digits is a multiple of 3
5 + ( - 3)
2
Convert 0.6 to a percent.
60%
x + 6 = 14
x = 8
Cheetah
Is 145 divisible by 5? How do you know?
Yes - ends in 0 or 5
- 7 + 12
5
Convert 27% to a decimal.
0.27
2n = 16
n = 8
How many hearts does an octopus have?
3
Is 248 divisible by 4? How do you know?
Yes - the last two digits are divisible by 4.
- 6 x 4
-24
What is 3/4 as a percent?
75%
3x = 27
x = 9
What percentage of the human body is water?
60%
Is 1134 divisible by 9? How do you know?
Yes - sum of digits is divisible by 9.
4
Convert 0.35 to a fraction in it's simplest form. You may use a whiteboard for this question.
7/20
2x + 5 = 17
x = 6
What organism has the largest brain relative to its body size?
Ant
Which of these numbers are divisible by 6? How do you know?
420, 425, 432
420 and 432 - divisible by both 2 and 3.
-5 + 12 - 7 + (-3)
-3
A shirt costs $100.00 and is 25% off. What does the shirt cost?
$75
2x + 3 + 5x = 31
You may use a whiteboard for this question.
x = 4
How long does it take light from the Sun to reach Earth?
8 minutes