Page 31 - Math Genius C2

E:\Working\Orange_Education\Math_Genius_2\Open_Files\Chap_01
\ 26-Sep-2025 Bharat Arora Proof-10 Reader’s Sign _______________________ Date __________

For the counting numbers 1, 2 and 3, the ordinal numbers are first, second and

third. All other ordinal numbers are written by adding 'th' at the end of the counting
number name.

Now, let us see how to write ordinal numbers beyond 10.

eleventh Twelfth Thirteenth Fourteenth Fifteenth Sixteenth Seventeenth

11th 12th 13th 14th 15th 16th 17th
Twenty- Twenty- Twenty- Twenty-
eighteenth Nineteenth Twentieth
first second third fourth
18th 19th 20th 21st 22nd 23rd 24th

activity
Experiential Learning
1. Arrange a few things in a line. E.g., duster, notebook, chalk, water bottle,
etc.
2. Ask questions like: ‘What is the position of the water bottle?’ or ‘Which object is at
the fourth position?’

3. You may ask some tricky questions like: ‘What is the position of the water bottle from the
right?’

Practice time 1H

1. Study the order of the children starting from the left in the ‘Chhuk-Chhuk Train’.

rohit
Bindia Akhil Irfan Tia
raman ria Bunty Tony
Sunny

Complete the given sentences with their positions. One has been done for you.

(a) Irfan is at the ________ place. (b) Bunty is at the ________ place.
seventh
(c) Tia is at the ________ place. (d) Raman is at the ________ place.

Mathematics-2 29