TOPIC 2 : REVISION

TOPIC 2: NUMBER PATTERNS AND SEQUENCES

OBJECTIVE

1	12, 18, 24, 30, 36, ... Describe the pattern of the above number sequence. A Adding 6 to the next number B Adding 6 to the previous number C Substracting 6 from the previous number D Multiplying the previous by 6
2	12, x, 24, 30, 36, y, ... Find the value of x+y. A 18 B 22 C 42 D 60
3	List the first three prime numbers greater than 30. A 31, 32, 33 B 31, 33, 37 C 31, 37, 41 D 37, 41, 43
4	Find the sum of all odd numbers between 10 and 20. A 5 B 30 C 55 D 75
5	23, J, K, L, M, 43 are prime numbers arranged in increasing order. Which of the following is 37? A J B K C L D M
6	If the sum of prime factors is 10, the possible value of the number is ... A 20 B 25 C 30 D 35
7	The following are the common multiples of 8 and 12 except A 96 B 192 C 200 D 288
8	28 is a common multiple of 2 and M. M is a prime factor of 14 and 42. What is the value of M? A 2 B 3 C 5 D 7
9	Find the highest common factor of 16 and 24. A 2 B 4 C 8 D 16
10	Given that (x-1) is the lowest common multiple of 9 and 12. Find the value of x. A 35 B 36 C 37 D 38

SUBJECTIVE

1	Describe the pattern of the following number sequences: a)     8, 10, 20, 22, 44, 46, ... b)     48, 45, 47, 44, 46, 43, ...
2	Extend the following number sequences for the next two numbers. a)     1, 1, 2, 6, 24 b)     3, 5, 10, 12, 24
3	List all the prime numbers between 20 and 40.
4	Find the lowest common multiple of the following numbers. a)     16 and 18 b)     9, 12 and 21
5	Determine whether each of the following numbers is a common factor of the numbers in the bracket. a)     4 (24, 52) b)     6 ( 84, 106)
6	Find the sum of all prime numbers between 10 and 20.
7	List the LCM of each of the following sets of numbers by listing all the multiples: a)     8 and 12 b)     12 and 16
8	Find the HCF of the following sets of numbers using prime factorisation. a)     16 and 56 b)     35 and 63