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Question (1)

QN0016027

In a 3 × 3 grid filled with numbers 1 to 9 without repetition, what do the numbers written outside the rows and columns represent?

(A) Product of numbers
(B) Difference of numbers
(C) Sum of numbers
(D) Average of numbers

Correct Answer: C

Explanation:

The circled numbers represent the sums of the corresponding rows and columns.

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Question (2)

QN0016028

The smallest possible row sum in a 3 × 3 grid using numbers 1–9 without repetition is

(A) 3
(B) 6
(C) 9
(D) 12

Correct Answer: B

Explanation:

Smallest sum = 1 + 2 + 3 = 6.

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Question (3)

QN0016029

The largest possible row sum in a 3 × 3 grid using numbers 1–9 without repetition is

(A) 21
(B) 22
(C) 24
(D) 27

Correct Answer: C

Explanation:

Largest sum = 7 + 8 + 9 = 24.

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Question (4)

QN0016030

Which of the following row sums is impossible in a 3 × 3 grid using numbers 1–9 without repetition?

(A) 10
(B) 18
(C) 24
(D) 25

Correct Answer: D

Explanation:

No row sum can exceed 24.

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Question (5)

QN0016031

The sum of all numbers from 1 to 9 is

(A) 36
(B) 40
(C) 45
(D) 50

Correct Answer: C

Explanation:

1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 = 45.

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Question (6)

QN0016032

The total of all three row sums in any valid 3 × 3 grid using numbers 1–9 is

(A) 30
(B) 36
(C) 40
(D) 45

Correct Answer: D

Explanation:

Every number from 1 to 9 is counted once, giving total 45.

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Question (7)

QN0016033

The total of all three column sums in any valid 3 × 3 grid using numbers 1–9 is

(A) 45
(B) 30
(C) 24
(D) 15

Correct Answer: A

Explanation:

Column sums together equal the sum of numbers 1–9, i.e., 45.

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Question (8)

QN0016034

If the row sums of a magic square made using 1–9 are equal, each row sum must be

(A) 9
(B) 12
(C) 15
(D) 18

Correct Answer: C

Explanation:

45 ÷ 3 = 15.

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Question (9)

QN0016035

A square grid in which every row, column and diagonal have the same sum is called a

(A) Prime square
(B) Magic square
(C) Number square
(D) Grid square

Correct Answer: B

Explanation:

Such a grid is called a magic square.

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Question (10)

QN0016036

The common sum in a magic square is called

(A) Equal sum
(B) Grid sum
(C) Magic sum
(D) Square sum

Correct Answer: C

Explanation:

The common row, column and diagonal sum is called the magic sum.

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Question (1)

In a 3 × 3 grid filled with numbers 1 to 9 without repetition, what do the numbers written outside the rows and columns represent?

Explanation:

Link:

Question (2)

The smallest possible row sum in a 3 × 3 grid using numbers 1–9 without repetition is

Explanation:

Link:

Question (3)

The largest possible row sum in a 3 × 3 grid using numbers 1–9 without repetition is

Explanation:

Link:

Question (4)

Which of the following row sums is impossible in a 3 × 3 grid using numbers 1–9 without repetition?

Explanation:

Link:

Question (5)

The sum of all numbers from 1 to 9 is

Explanation:

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Question (6)

The total of all three row sums in any valid 3 × 3 grid using numbers 1–9 is

Explanation:

Link:

Question (7)

The total of all three column sums in any valid 3 × 3 grid using numbers 1–9 is

Explanation:

Link:

Question (8)

If the row sums of a magic square made using 1–9 are equal, each row sum must be

Explanation:

Link:

Question (9)

A square grid in which every row, column and diagonal have the same sum is called a

Explanation:

Link:

Question (10)

The common sum in a magic square is called

Explanation:

Link:

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