## Samacheer Kalvi 3rd Standard Maths Book Solutions Term 2 Chapter 2 Patterns

Recall (Text Book Page No. 19):

Circle the odd numbers in the given sequence.

(i) 26, 29, 37, 42,

45
29, 37, 45

(ii) 85, 84, 76, 65, 64
85, 65

(iii) 11, 22, 33, 44, 55, 66.
11, 33, 55

(iv) 357, 896, 572, 951, 865, 423
357, 951, 865, 423

(iv) 952, 698, 342, 780, 920, 850.
No odd numbers.

Complete the table from the above numbers.

Observe the number chart given below. Colour the odd numbers with green and even numbers with blue.

We observe that odd and even numbers occur alternatively.

Complete the patterns :

i) 21, 22, 23, ____, ____, ____, ____, ____
21, 22, 23, 24, 25, 26, 27, 28

ii) 1, 3, 5, ____, ____, ____, ____, ____
1, 3, 5, 7, 9, 11, 13, 15

iii) 2, 4, 6, ____, ____, ____, ____, ____
2, 4, 6, 8, 10, 12, 14, 16

iv) 85, 86, 87, 88, ____, ____, ____, ____, ____
85, 86, 87, 88, 89, 90, 91, 92, 93

v) 39, 41, 43, ____, ____, ____, ____, ____
39, 41, 43, 45, 47, 49, 51, 53

Let’s explore patterns while adding and subtracting odd and even numbers.

Add the following numbers:

(i)

(ii)

(iii)

(iv)

(v)

(vi)

Thus, we observe that addition of odd and even numbers involve a pattern.

Lets tabulate the patterns observed.

Subtract the following numbers:

(i)

(ii)

(iii)

(iv)

(v)

(vi)

Let’s tabulate the patterns observed.

Exercise (Text Book Page No. 22):

Question 1.
Make the patterns by multiplying with 10.

i) 1, 3, 5, 7, ____, ____, ____, ____
10, 30, 50, 70

ii) 2, 4, 6, 8, ____, ____, ____, ____
20, 40, 60, 80

iii) 1, 3, 7, 13, ____, ____, ____, ____
10, 30, 70, 130

iv) 3, 5, 9, 15, ____, ____, ____, ____
30, 50, 90, 150

Question 2.
Make the patterns by dividing with 10.

i) 110, 120, 130, ____, ____, ____, ____
11, 12, 13

ii) 210, 230, 250, ____, ____, ____, ____
21, 23, 25

iii) 470, 430, 410, ____, ____, ____, ____
47, 43, 41

iv) 540, 470, 350, ____, ____, ____, ____
54, 47, 35

v) 500, 210, 520, ____, ____, ____, ____
50, 21, 52

Question 3.
Find the rule and complete the following pattern.

3rd Standard Maths Guide Patterns Additional Questions and Answers

I. Complete the patterns.

(i) 31, 32, 33, ____, ____, ____, ____, ____
31, 32, 33, 34, 35, 36, 37, 38

(ii) 7, 9, 11, ____, ____, ____, ____, ____
7, 9, 11, 13, 15, 17, 19, 21

(iii) 12, 14, 16, ____, ____, ____, ____, ____
12, 14, 16, 18, 20, 22, 24, 26.

3rd Standard Maths Guide Numbers Additional Questions and Answers

II. Make the patterns by multiplying with 10.

(i) 9, 11, 13, 15, ____, ____, ____, ____, ____
90, 110, 130, 150, 170, ….

(ii) 10, 12, 14, 16, ____, ____, ____, ____, ____
100, 120, 140, 160, 180,….

3rd Standard Maths Guide Numbers Additional Questions and Answers

III. Make the patterns by dividing with 10.

(i) 660, 640, 620, ____, ____, ____, ____, ____
66, 64, 62, 60, …

(ii) 320, 350, 380, ____, ____, ____, ____, ____
32, 35, 38, 40, ..

3rd Standard Maths Guide Numbers Additional Questions and Answers

IV. Add the following numbers.

(i) 942 + 413

(ii) 667 + 764