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Question (21)

QN0015687

A triangular pattern has 1 dot in the first figure, 3 in the second, 6 in the third and 10 in the fourth. How many dots are in the fifth figure?

(A) 12
(B) 14
(C) 15
(D) 16

Correct Answer: C

Explanation:

Differences are 2, 3, 4, so next is 5.

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Question (22)

QN0015688

Find the missing term: 2, 6, 18, 54, __

(A) 108
(B) 144
(C) 162
(D) 216

Correct Answer: C

Explanation:

Multiply by 3 each time.

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Question (23)

QN0015689

The next number in 30, 27, 24, 21, __ is:

(A) 16
(B) 18
(C) 19
(D) 20

Correct Answer: B

Explanation:

Subtract 3 each time.

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Question (24)

QN0015690

Which pattern rule generates 5, 10, 20, 40, ...?

(A) Add 5
(B) Multiply by 2
(C) Multiply by 4
(D) Add 10

Correct Answer: B

Explanation:

Each term is doubled.

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Question (25)

QN0015691

What is the next term in 2, 5, 10, 17, 26, __?

(A) 35
(B) 36
(C) 37
(D) 38

Correct Answer: C

Explanation:

Differences are 3, 5, 7, 9, so next difference is 11.

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Question (26)

QN0015692

The pattern 1, 2, 4, 7, 11, __ increases by:

(A) Consecutive odd numbers
(B) Consecutive even numbers
(C) Consecutive natural numbers
(D) Multiples of 2

Correct Answer: C

Explanation:

Differences are 1, 2, 3, 4, ...

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Question (27)

QN0015693

What is the next term in the pattern from Question 26?

(A) 15
(B) 16
(C) 17
(D) 18

Correct Answer: B

Explanation:

Add 5 to 11.

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Question (28)

QN0015694

Which number should replace the blank: 4, 9, 16, 25, __?

(A) 30
(B) 34
(C) 36
(D) 49

Correct Answer: C

Explanation:

These are consecutive square numbers.

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Question (29)

QN0015695

The sequence 100, 95, 85, 70, __ follows a decreasing pattern. The next term is:

(A) 55
(B) 50
(C) 60
(D) 65

Correct Answer: B

Explanation:

Differences are −5, −10, −15, so next is −20.

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Question (30)

QN0015696

Which statement best describes a pattern?

(A) A random arrangement of numbers
(B) A repeated or predictable relationship
(C) A mathematical error
(D) A type of equation only

Correct Answer: B

Explanation:

Patterns follow a predictable rule.

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Question (21)

A triangular pattern has 1 dot in the first figure, 3 in the second, 6 in the third and 10 in the fourth. How many dots are in the fifth figure?

Explanation:

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Question (22)

Find the missing term: 2, 6, 18, 54, __

Explanation:

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Question (23)

The next number in 30, 27, 24, 21, __ is:

Explanation:

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Question (24)

Which pattern rule generates 5, 10, 20, 40, ...?

Explanation:

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Question (25)

What is the next term in 2, 5, 10, 17, 26, __?

Explanation:

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Question (26)

The pattern 1, 2, 4, 7, 11, __ increases by:

Explanation:

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Question (27)

What is the next term in the pattern from Question 26?

Explanation:

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Question (28)

Which number should replace the blank: 4, 9, 16, 25, __?

Explanation:

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Question (29)

The sequence 100, 95, 85, 70, __ follows a decreasing pattern. The next term is:

Explanation:

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Question (30)

Which statement best describes a pattern?

Explanation:

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