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activity
Perform this activity with your benchmate.
Take some number cards on which an even or odd number should be written.
Put them upside down. Then both of you need to pick up any card randomly and show the number written to
each other.
Tell whether they are even or odd.
If you find the sum of the two numbers, then your partner will compute their product.
Now, complete the following statements by observing your result on even and odd numbers.
• The sum of two even numbers is always .................... .
• The sum of two odd numbers is always .................... .
• The sum of an even and an odd numbers is always .................... .
• The product of two even numbers is always .................... .
• The product of two odd numbers is always .................... .
• The product of an even and an odd numbers is always .................... .

Practice Time 5B

1. Who am I?

(a) I am a number less than 40. One of my factor is 7. The sum of my digits is 8.
(b) I am a number greater than 5. I am a factor of 30. I am a multiple of 5. I am an odd number.

(c) I am a number less than 100. Two of my factors are 3 and 5. One of my digits is 9 more than the
other.
(d) I am a factor of 120. I am a multiple of 2 and 3. I am 1 away from a multiple of 5.

2. Write down the first five even multiples of 17.
3. From the list of numbers: 7, 9, 12, 21, 23, 30, 36, 45, 54, 63, 70, 77 and 80;

(a) List the multiples of 7 (b) Write down the multiples of 12
(c) Write three multiples of 4
4. From the list of numbers: 3, 5, 7, 9, 11, 15, 24, 30

(a) Write down a factor of 12 (b) Write down the factors of 30
(c) Write down the common factor of 12 and 15

(d) Write down a multiple of 3 which is an even number.
5. Sort all the numbers into the correct boxes:

1, 2, 3, 6, 8, 11, 12, 15, 18, 24, 30, 32, 35, 39

Even Odd

Multiples Not a Multiples Not a multiple
of 3 Multiple of 3 of 5 of 5

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