Page 30 - Math Genius C2

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2. Circle ( ) the even numbers. One has been done for you.

11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30

3. Circle ( ) the odd numbers. One has been done for you.

26 27 28 29 30 31 32 33 34 35

36 37 38 39 40 41 42 43 44 45

4. Write the even numbers that come between:

(a) 30 and 40 ___________________________________________

(b) 61 and 73 ___________________________________________

5. Write the odd numbers that come between:

(a) 50 and 60 ___________________________________________

(b) 79 and 91 ___________________________________________

ORDINaL NUMBERS

We use numbers to show the position

of things.

Here, 10 animals are in a queue to

perform in the circus. Let us look at

the positions of these animals. 2nd 4th 6th 8th
(second) (fourth) (sixth) (eighth)
The numbers such as first, second,

third, ... which tell us the position of
an object in a collection, are called

ordinal numbers. 1st 3rd 5th 7th 9th 10th
(first) (third) (fifth) (seventh) (ninth) (tenth)
The numbers which are used to say

how many of something there are, such as Get it right!

one (1), two (2), three (3), four (4), ... are Forth 7 Fourth 3

called cardinal numbers. Nineth 7 Ninth 3

28 Mathematics-2