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Question (21)

QN0030353

In a magic grid, the magic sum is 10. Two numbers in a row are –3 and 8. The third number is

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

Correct Answer: B

Explanation:

Add the known numbers and subtract the result from the magic sum. The missing number is 5.

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Question (22)

QN0030354

A column of a magic grid contains –6, 11 and –2. What is the magic sum?

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

Correct Answer: B

Explanation:

–6 + 11 + (–2) = 3.

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Question (23)

QN0030355

In a magic grid, the magic sum is –5. Two numbers in a diagonal are –9 and 7. The third number is

(A) –2
(B) –3
(C) –4
(D) –5

Correct Answer: B

Explanation:

–9 + 7 = –2. Therefore, the missing number is –3.

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Question (24)

QN0030356

Which statement is correct for every magic grid of integers?

(A) Every row has a different sum.
(B) Only the diagonals have equal sums.
(C) Every row, column and diagonal has the same sum.
(D) Every number in the grid is positive.

Correct Answer: C

Explanation:

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

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Question (25)

QN0030357

In a magic grid, the magic sum is 15. Two numbers in a column are 9 and –4. The missing number is

(A) 8
(B) 9
(C) 10
(D) 11

Correct Answer: C

Explanation:

9 + (–4) = 5. Therefore, the missing number is 10.

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Question (26)

QN0030358

A row of a magic grid contains 14, –8 and 5. What is the magic sum?

(A) 9
(B) 10
(C) 11
(D) 12

Correct Answer: C

Explanation:

14 + (–8) + 5 = 11.

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Question (27)

QN0030359

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

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

Correct Answer: B

Explanation:

–5 + (–6) = –11. The missing number is 3.

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Question (28)

QN0030360

Which of the following can be the magic sum of a magic grid of integers?

(A) Only positive integers
(B) Only negative integers
(C) Only zero
(D) Positive, negative or zero

Correct Answer: D

Explanation:

The magic sum may be positive, negative or zero.

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Question (29)

QN0030361

A diagonal of a magic grid contains –12, 9 and 6. The magic sum is

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

Correct Answer: B

Explanation:

–12 + 9 + 6 = 3.

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Question (30)

QN0030362

In a magic grid, the magic sum is 7. Two numbers in a column are –4 and 2. The third number is

(A) 7
(B) 8
(C) 9
(D) 10

Correct Answer: C

Explanation:

–4 + 2 = –2. Therefore, the missing number is 9.

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Question (21)

In a magic grid, the magic sum is 10. Two numbers in a row are –3 and 8. The third number is

Explanation:

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Question (22)

A column of a magic grid contains –6, 11 and –2. What is the magic sum?

Explanation:

Link:

Question (23)

In a magic grid, the magic sum is –5. Two numbers in a diagonal are –9 and 7. The third number is

Explanation:

Link:

Question (24)

Which statement is correct for every magic grid of integers?

Explanation:

Link:

Question (25)

In a magic grid, the magic sum is 15. Two numbers in a column are 9 and –4. The missing number is

Explanation:

Link:

Question (26)

A row of a magic grid contains 14, –8 and 5. What is the magic sum?

Explanation:

Link:

Question (27)

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

Explanation:

Link:

Question (28)

Which of the following can be the magic sum of a magic grid of integers?

Explanation:

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Question (29)

A diagonal of a magic grid contains –12, 9 and 6. The magic sum is

Explanation:

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Question (30)

In a magic grid, the magic sum is 7. Two numbers in a column are –4 and 2. The third number is

Explanation:

Link:

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