Page 22 - Math Smart - 7
P. 22
O Explore 5 as a factor.
a) Circle each number that has 5 as a factor.
34 5258 8275 15 447 1090 5550 25 000 10 165 2222 144 555
b) What do you notice about all the numbers you have circled?
c) Write a divisibility rule for 5.
d) List 6 six-digit numbers that are divisible by 5. The numbers must not appear in the list in
Question 3a.
O Explore ||Q as a factor.
a) Circle each number that has 2 as a factor.
14 188 275 4447 1 096 8 889 1 010 10168 2 222 144986
b) What do you notice about all the numbers you have circled?
c) Write a divisibility rule for 2. Hint; Think about odd and even numbers.
d) List 6 seven-digit numbers that are divisible by 2. The numbers must not appear in the list
in Question 4a.
@ Explore 4 as a factor.
a) Circle each number that has 4 as a factor.
24 188 275 4416 1096 8889 1017 10 168 2221 134 904
b) What do you notice about all the numbers you have circled?
c) Write a divisibility rule for 4. Hint: Check the divisibility of the last two digits of the
number.
d) List 6 seven-digit numbers that are divisible by 4. The numbers must not appear in the list
in Question 5a.
O Explore 8 as a factor.
'
a) Circle each number that has 8 as a factor.
214 888 2032 4416 1011 8889 1016 10 168 2221 134 904
b) What do you notice about all the numbers you have circled?
E UNIT 1 Factors, Multiples and Primes
