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Question (11)

QN0030343

In a magic grid, the magic sum is –7. Two numbers in a column are –3 and –8. The missing number is

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

Correct Answer: C

Explanation:

–3 + (–8) = –11. Therefore, the missing number is 4.

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Question (12)

QN0030344

Which of the following can appear in a magic grid of integers?

(A) Only positive integers
(B) Only negative integers
(C) Both positive and negative integers
(D) Only even integers

Correct Answer: C

Explanation:

A magic grid may contain positive integers, negative integers and zero.

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Question (13)

QN0030345

A row of a magic grid contains –10, 12 and –1. The magic sum is

(A) –1
(B) 0
(C) 1
(D) 2

Correct Answer: C

Explanation:

–10 + 12 + (–1) = 1.

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Question (14)

QN0030346

In a magic grid, the magic sum is 6. Two numbers in a row are –5 and 8. The third number is

(A) 1
(B) 2
(C) 3
(D) 4

Correct Answer: C

Explanation:

–5 + 8 = 3. Therefore, the missing number is 3.

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Question (15)

QN0030347

Which of the following is necessary for a 3 × 3 magic grid?

(A) Only the rows have equal sums.
(B) Only the columns have equal sums.
(C) Rows, columns and diagonals all have equal sums.
(D) All numbers must be positive.

Correct Answer: C

Explanation:

A magic grid requires equal sums in every row, column and diagonal.

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Question (16)

QN0030348

In a magic grid, the magic sum is –2. Two numbers in a diagonal are 7 and –6. The third number is

(A) –2
(B) –3
(C) –4
(D) –5

Correct Answer: B

Explanation:

7 + (–6) = 1. Therefore, the missing number is –3.

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Question (17)

QN0030349

A column of a magic grid contains the integers 5, –9 and 8. What is the magic sum?

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

Correct Answer: C

Explanation:

5 + (–9) + 8 = 4.

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Question (18)

QN0030350

In a magic grid, the magic sum is 8. Two numbers in a column are –3 and 9. The missing number is

(A) 1
(B) 2
(C) 3
(D) 4

Correct Answer: B

Explanation:

–3 + 9 = 6. Therefore, the missing number is 2.

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Question (19)

QN0030351

Which operation is mainly used to verify whether a grid is a magic grid?

(A) Multiplication
(B) Division
(C) Addition
(D) Subtraction

Correct Answer: C

Explanation:

The sums of rows, columns and diagonals are checked using addition.

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Question (20)

QN0030352

A row of a magic grid contains –7, –2 and 15. The magic sum is

(A) 4
(B) 5
(C) 6
(D) 7

Correct Answer: C

Explanation:

–7 + (–2) + 15 = 6.

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Question (11)

In a magic grid, the magic sum is –7. Two numbers in a column are –3 and –8. The missing number is

Explanation:

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Question (12)

Which of the following can appear in a magic grid of integers?

Explanation:

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Question (13)

A row of a magic grid contains –10, 12 and –1. The magic sum is

Explanation:

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Question (14)

In a magic grid, the magic sum is 6. Two numbers in a row are –5 and 8. The third number is

Explanation:

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Question (15)

Which of the following is necessary for a 3 × 3 magic grid?

Explanation:

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Question (16)

In a magic grid, the magic sum is –2. Two numbers in a diagonal are 7 and –6. The third number is

Explanation:

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Question (17)

A column of a magic grid contains the integers 5, –9 and 8. What is the magic sum?

Explanation:

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Question (18)

In a magic grid, the magic sum is 8. Two numbers in a column are –3 and 9. The missing number is

Explanation:

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Question (19)

Which operation is mainly used to verify whether a grid is a magic grid?

Explanation:

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Question (20)

A row of a magic grid contains –7, –2 and 15. The magic sum is

Explanation:

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