Practice the series of numbers given in the worksheet on basic pattern. The questions are based on completing the series of numbers to find the forward numbers and the number which is added to get the next one.

**1. Complete the pattern in the given series:**

(i) 1, 3, 5, 7, ____, ____, ____ .

(ii) 2, 5, 8, 11, ____, ____, ____ .

(iii) 11, 21, 31, 41, ____, ____, ____ .

(iv) 31, 34, 37, 40, ____, ____, ____ .

(v) 51, 56, 61, 66, ____, ____, ____ .

(vi) 4, 8, 16, 32, ____, ____, ____ .

(vii) 19, 29, 39, 49, ____, ____, ____ .

(viii) 7, 12, 17, 22, ____, ____, ____ .

**2. Write the next four terms in each sequence:**

(i) 0, 3, 6, 9, ____, ____, ____, ____.

(ii) 4, 9, 14, 19, ____, ____, ____, ____.

(iii) 10, 15, 20, 25, ____, ____, ____, ____.

(iv) 18, 25, 32, 39, ____, ____, ____, ____.

(v) 40, 35, 30, 25, ____, ____, ____, ____.

(vi) 70, 60, 50, 40, ____, ____, ____, ____.

(vii) 2, 4, 8, 16, ____, ____, ____, ____.

(viii) 5, 10, 20, 40, ____, ____, ____, ____.

**3.** I am the seventh number in the sequence of numbers: 4, 6,
8, 10, ____. What number am I?

**4.** I am the eighth number in the sequence of numbers: 9, 18,
27, 36, ____. What number am I?

**5.** **Complete the following sequence of numbers by spotting
the pattern.**

(i) 4, 7, 10, ____, 16, ____, 22.

(ii) 1, ____, 9, 27, 81

(iii) 10, ____, 30, 40, ____, 60, ____, ____.

(iv) 38, 35, 32, ____, ____, 23, 20, ____, 14.

**6. Observe the
following growing patterns of numbers. Find out, what is added to get the next
one:**

(i) 1, 4, 7, 10, 13, 16, ____, ____, ____ .

(ii) 0, 2, 6, 12, 20, ____, ____, ____ .

(iii) 1, 3, 7, 13, 21, ____, ____, ____ .

(iv) 0, 1, 4, 9, 16, ____, ____, ____ .

(v) 17, 23, 29, 35, 41, ____, ____, ____ .

(vi) 13, 16, 19, 22, ____, ____, ____ .

(vii) 31, 38, 45, 52, ____, ____, ____ .

(viii) 1, 5, 9, 13, ____, ____, ____ .

**7.** A child’s height when it is 1 year old is 60 cm and a
year later it is 70 cm. Assuming the child grows the same height each year,
find the height of the child when it is 5 years old.

Answers for the worksheet on basic pattern of numbers are given below to check the exact answers of the above number series.

**Answers:**

**1. **(i) 9, 11, 13.

(ii) 14, 17, 20.

(iii) 51, 61, 71.

(iv) 43, 46, 49.

(v) 71, 76, 81.

(vi) 64, 128, 256.

(vii) 59, 69, 79.

(viii) 27, 32, 37.

**2.** (i) 12, 15, 18, 21

(ii) 24, 29, 34, 39

(iii) 30, 35, 40, 45

(iv) 46, 53, 60, 67

(v) 20, 15, 10, 5

(vi) 30, 20, 10, 0

(vii) 32, 64, 128, 256

(viii) 80, 160, 320, 640

**3.** 16

**4.** 72

**5.** (i) 13, 19

(ii) 3

(iii) 20, 50, 70, 80

(iv) 29, 26, 17

**6. **(i) 19, 22, 25; 3 is added to get the next number.

(ii) 30, 42, 56; multiple of 2 is added to get the next number.

(iii) 31, 43, 57; multiple of 2 is added to get the next number.

(iv) 25, 36, 49; Consecutive odd numbers 1, 3, 5, 7, 9, 11, 13 is added to get the next number.

(v) 47, 53, 59; 6 is added to get the next number.

(vi) 25, 28, 31; 3 is added to get the next number.

(vii) 59, 66, 73; 7 is added to get the next number.

(viii) 17, 21, 25; 4 is added to get the next number.

**7.** 100 cm

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