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Question (31)

QN0020242

The centre value of a 2 × 2 calendar grid is numerically equal to:

(A) Average of the four entries
(B) Smallest entry
(C) Largest entry
(D) Difference of corner entries

Correct Answer: A

Explanation:

The average equals the central value.

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Question (32)

QN0020243

If the average of the four entries in a 2 × 2 grid is 20, the top-left number is:

(A) 14
(B) 15
(C) 16
(D) 17

Correct Answer: C

Explanation:

a+4=20 ⇒ a=16.

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Question (33)

QN0020244

If the top-left entry is p, the average of the four entries is:

(A) p + 2
(B) p + 3
(C) p + 4
(D) p + 5

Correct Answer: C

Explanation:

Average = (4p+16)/4 = p+4.

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Question (34)

QN0020245

A 2 × 2 calendar grid has sum 124. Its top-left entry is:

(A) 25
(B) 26
(C) 27
(D) 28

Correct Answer: C

Explanation:

4a+16=124 ⇒ a=27.

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Question (35)

QN0020246

If the top-left number is 27, the bottom-left number is:

(A) 32
(B) 33
(C) 34
(D) 35

Correct Answer: C

Explanation:

27+7=34.

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Question (36)

QN0020247

If the top-left number is 27, the bottom-right number is:

(A) 34
(B) 35
(C) 36
(D) 37

Correct Answer: B

Explanation:

27+8=35.

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Question (37)

QN0020248

If the four numbers of a 2 × 2 calendar grid add to 140, the top-left number is:

(A) 29
(B) 30
(C) 31
(D) 32

Correct Answer: C

Explanation:

4a+16=140 ⇒ a=31.

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Question (38)

QN0020249

Calendar grids are useful because they help reveal:

(A) Random arrangements
(B) Algebraic patterns and relationships
(C) Measurement formulas only
(D) Geometrical constructions only

Correct Answer: B

Explanation:

Grids reveal number patterns and relationships.

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Question (39)

QN0020250

Which property of a calendar makes algebraic analysis possible?

(A) Dates increase in a regular pattern
(B) Dates are coloured differently
(C) Months have different names
(D) Calendars contain holidays

Correct Answer: A

Explanation:

The regular arrangement creates predictable patterns.

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Question (40)

QN0020251

The main idea behind Fun with Grids is to use algebra to:

(A) Explain patterns hidden in number arrangements
(B) Draw graphs
(C) Measure distances
(D) Perform statistical surveys

Correct Answer: A

Explanation:

Algebra helps explain hidden numerical patterns.

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Question (31)

The centre value of a 2 × 2 calendar grid is numerically equal to:

Explanation:

Link:

Question (32)

If the average of the four entries in a 2 × 2 grid is 20, the top-left number is:

Explanation:

Link:

Question (33)

If the top-left entry is p, the average of the four entries is:

Explanation:

Link:

Question (34)

A 2 × 2 calendar grid has sum 124. Its top-left entry is:

Explanation:

Link:

Question (35)

If the top-left number is 27, the bottom-left number is:

Explanation:

Link:

Question (36)

If the top-left number is 27, the bottom-right number is:

Explanation:

Link:

Question (37)

If the four numbers of a 2 × 2 calendar grid add to 140, the top-left number is:

Explanation:

Link:

Question (38)

Calendar grids are useful because they help reveal:

Explanation:

Link:

Question (39)

Which property of a calendar makes algebraic analysis possible?

Explanation:

Link:

Question (40)

The main idea behind Fun with Grids is to use algebra to:

Explanation:

Link:

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