Number Pattern and Sequence

The 1^st pattern has 3 counters.

The 2^nd pattern has 6 counters.

The 3^rd pattern has 10 counters.

The 4^th pattern has 15 counters.

How many counters are needed to make 9^th pattern?

• 36

• 45

• 55

• 66

The 1^st pattern has 2 counters.

The 2^nd pattern has 6 counters.

The 3^rd pattern has 12 counters.

The 4^th pattern has 20 counters.

How many counters are needed to make 10^th pattern?

• 100

• 110

• 120

• 130

The 1^st pattern has 1 counters.

The 2^nd pattern has 4 counters.

The 3^rd pattern has 9 counters.

The 4^th pattern has 16 counters.

The 5^th pattern has 25 counters.

How many counters are needed to make 12^nd pattern?

• 225

• 196

• 169

• 144

The 20^th term of sequence

15, 19, 23, 27 is ...

• 91

• 95

• 96

• 101

Two consecutive sequence

3, 4, 6, 9 is …

• 13, 18

• 13, 17

• 12, 26

• 12, 25

The 50^th term of sequence

7, 15, 23, 31, 39 is …

• 392

• 399

• 407

• 448

The 50^th term of sequence 20, 17, 14, 11, 8 is …

• -167

• -127

• 127

• 167

Look at the pattern made from matchsticks. The 1st pattern has 4 matchsticks. The 2nd pattern has 12 matchsticks. The 3rd pattern has 24 matchsticks. How many matchsticks are needed to make the 6th pattern?

• 108

• 84

• 45

• 30

The 12^th term of sequence 42, 45, 48, 51, 54, is...

• 75

• 85

• 55

• 65

Complete the following Sequence.

2,5,8,11,__,__,__

• 14

• 18

• 17

• 20