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Question (1)

QN0020172

In a number pyramid, each number is the ______ of the two numbers directly below it.

(A) Product
(B) Difference
(C) Sum
(D) Quotient

Correct Answer: C

Explanation:

Each box contains the sum of the two boxes directly below it.

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Question (2)

QN0020173

Which rule is used to fill a number pyramid?

(A) Add adjacent numbers
(B) Multiply adjacent numbers
(C) Divide adjacent numbers
(D) Subtract adjacent numbers

Correct Answer: A

Explanation:

Adjacent numbers are added to get the number above.

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Question (3)

QN0020174

In the simplest number pyramid with bottom entries a and b, the top entry is:

(A) ab
(B) a + b
(C) a − b
(D) a ÷ b

Correct Answer: B

Explanation:

The top number is obtained by adding a and b.

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Question (4)

QN0020175

If the bottom row of a pyramid is 4 and 9, the top number is:

(A) 13
(B) 36
(C) 5
(D) 12

Correct Answer: A

Explanation:

4 + 9 = 13.

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Question (5)

QN0020176

If the bottom row is 2, 5, 7, the middle row is:

(A) 7, 12
(B) 10, 35
(C) 3, 2
(D) 12, 14

Correct Answer: A

Explanation:

2 + 5 = 7 and 5 + 7 = 12.

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Question (6)

QN0020177

If the bottom row is 2, 5, 7, the topmost number is:

(A) 17
(B) 18
(C) 19
(D) 20

Correct Answer: C

Explanation:

7 + 12 = 19.

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Question (7)

QN0020178

For a three-row pyramid with bottom row a, b, c, the topmost expression is:

(A) a + b + c
(B) a + 2b + c
(C) 2a + b + c
(D) a + b + 2c

Correct Answer: B

Explanation:

Top = (a + b) + (b + c) = a + 2b + c.

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Question (8)

QN0020179

If the bottom row is 6, 4, 8, the topmost number is:

(A) 20
(B) 21
(C) 22
(D) 23

Correct Answer: C

Explanation:

6 + 2×4 + 8 = 22.

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Question (9)

QN0020180

If the bottom row is 9, 3, 5, the topmost number is:

(A) 18
(B) 19
(C) 20
(D) 21

Correct Answer: C

Explanation:

9 + 2×3 + 5 = 20.

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Question (10)

QN0020181

In a pyramid with bottom row 7, x, 5 and top number 24, the value of x is:

(A) 5
(B) 6
(C) 7
(D) 8

Correct Answer: B

Explanation:

7 + 2x + 5 = 24 ⇒ x = 6.

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Question (1)

In a number pyramid, each number is the ______ of the two numbers directly below it.

Explanation:

Link:

Question (2)

Which rule is used to fill a number pyramid?

Explanation:

Link:

Question (3)

In the simplest number pyramid with bottom entries a and b, the top entry is:

Explanation:

Link:

Question (4)

If the bottom row of a pyramid is 4 and 9, the top number is:

Explanation:

Link:

Question (5)

If the bottom row is 2, 5, 7, the middle row is:

Explanation:

Link:

Question (6)

If the bottom row is 2, 5, 7, the topmost number is:

Explanation:

Link:

Question (7)

For a three-row pyramid with bottom row a, b, c, the topmost expression is:

Explanation:

Link:

Question (8)

If the bottom row is 6, 4, 8, the topmost number is:

Explanation:

Link:

Question (9)

If the bottom row is 9, 3, 5, the topmost number is:

Explanation:

Link:

Question (10)

In a pyramid with bottom row 7, x, 5 and top number 24, the value of x is:

Explanation:

Link:

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