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15 Playing With Numbers

Learning Objectives

After studying this chapter, students will be able to... Scan to learn
 express numbers in general form
 identify the properties of sum and difference of 2-digit and 3-digit numbers by adding and subtracting
the numbers and its reverse
 find the values of letters in puzzles using operations
 decode clues, solve puzzles and magic squares
 generalise the divisibility rule of 2, 3, 4, 5, 6, 8, 9, 10, and 11.

get ready!

Mrs Sinha is the CEO of a multinational company. She got a new car as a gift on Diwali’s occasion.

Thanks Nisha! Sure, we all
will go on a long tour.

Congratulation
mamma! This
new car is very
nice. Now we
will ride in our
new car.

It is the registration
number. Letters
are used for coding
states and districts in
India.

Look at the number plate of the car.
Why is DL 09 U 9111 written using
letters and numbers?

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