Chapter 2 Number Patterns and Sequences

CHAPTER 2 NUMBER PATTERNS AND SEQUENCES NOTE OF NUMBER PATTERNS AND SEQUENCES 1. Number Sequence – have a pattern 2. Odd Number- Cannot divide by 2 3. Even Number- Can divide by 2 4. Prime Number- Can divide by 1 and by itself (1 is not Prime Number) 5. LCM 4 2 3

4 8 12 1 2 3 1 1 3 1 1 1 LCM of 4, 8 and 12 = 4 × 2 × 3 = 24

6. HCF 2 2

8 12 20 4 6 10 2 3 5 HCF of 8, 12 and 20= 2 × 2 × =4

QUESTION OF NUMBER PATTERNS AND SEQUENCES

1. Find the missing number in the sequence 4 , 7, 13 , 22 , ___ , 49

2. Write the first five multiple of 8

3. List all the Prime Numbers between 4o and 60.

4. Find the common multiple of 6 and 8 which are less than 80.

5. Find the LCM of 4, 6 and 18.

6. Find all the prime factor of 32.

7. Find the HCF of 18, 36and 54.

8. Find the sum of all the prime factors of 196.

9. Find the product of the common factor of 18 and 30.

10. Given that (k−4) is the LCM of 18, find the value of k.