Quiz about Numbers And Operations

Question 1

An expression is given. $$\frac{(3^{2})^{3} \cdot 3^{6}}{3^{4}}$$

Select the expression that is equivalent to the given expression.

Accepted Answer

Covalent bond

Answer

$$3^{8}$$

Answer

$$3^{-4}$$

Answer

$$3^{9}$$

Answer

$$3^{-8}$$

Question 2

A table showing the number of annual exports from three regions is shown.

![](http://admin.getprephub.com/media/editor/6g25_20230322214804789176.png)
Complete the statements comparing the number of exports from the regions.
Ecuador exports ______$$(3 / 30 / 300)$$ times______ (as many products as/fewer products than) Japan annually .

Accepted Answer

Covalent bond

Answer

Ecuador exports 30 times fewer products than Japan annually.

Answer

Ecuador exports 3 times fewer products than Japan annually.

Answer

Ecuador exports 30 times as many products as Japan annually.

Answer

Ecuador exports 300 times as many products as Japan annually.

Question 3

The masses of two animals at a zoo are described, where $$b$$ and $$c$$ are integers.
The mass of an African elephant is $$6,125,000$$ grams, or about $$6 	imes 10^{b}$$ grams. The mass of a silverback gorilla is $$185,000$$ grams, or about $$2 	imes 10^{c}$$ grams. What are the values of $${b}$$ and $${c}$$ ?

Accepted Answer

Covalent bond

Answer

$$b=6 ; c=5$$

Answer

$$b=5 ; c=6$$

Answer

$$b=6 ; c=6$$

Answer

$$b=5 ; c=5$$

Question 4

Select the expression that is equivalent to the following expression. $$(2^{3})^{-2} \cdot 2^{4}$$

Accepted Answer

Covalent bond

Answer

$$\frac{1}{2^{2}}$$

Answer

$$2^{5}$$

Answer

$$2^{2}$$

Answer

$$2 \cdot 2^{4}$$

Question 5

Which expression is equivalent to $$17^{3} \cdot 17^{10}$$ ?

Accepted Answer

Covalent bond

Answer

$$17^{3+10}$$

Answer

$$17^{3-10}$$

Answer

$$17^{3 \cdot 10}$$

Answer

$$17^{\frac{3}{10}}$$

Numbers And Operations Class 8 Maths Problems and Solutions

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