Quiz about Numbers And Operations

Question 1

An equation is given, where $$P$$ and $$Q$$ represent integers.

$$3^{P} \cdot 3^{Q}=\frac{1}{9}$$

What are possible values of $$P$$ and $$Q$$ ?

Accepted Answer

Covalent bond

Answer

$$P=-5 ; Q=3$$

Answer

$$P=5 ; Q=-3$$

Answer

$$P=-1 ; Q=3$$

Answer

$$P=-3 ; Q=-5$$

Question 2

A teacher surveys her students to find out whether they prefer riding a bike or playing soccer. The two-way table shows some of her data.

![](http://admin.getprephub.com/media/editor/Screenshot%202023-04-27%20at%204.23.31%20PM_20230427142804370355.png)

Based on her data, the teacher concludes that if a girl is chosen at random from this sample, there is a $$56 \%$$ probability that she prefers playing soccer. What is the total number of students the teacher surveyed?

Accepted Answer

Covalent bond

Answer

$$166$$

Answer

$$190$$

Answer

$$688$$

Answer

$$435$$

Question 3

A scientist estimates that there are $$2.2 	imes 10^{7}$$ walleye in Lake Erie. The total volume of Lake Erie is $$4.83 	imes 10^{11}$$ cubic meters. A pool with a volume of $$200,000$$ cubic meters is built to model the lake.
How many walleye should be put into the pool to model the conditions in the lake?

Accepted Answer

Covalent bond

Answer

$$4.39 	imes 10^{9}$$

Answer

$$8.6 	imes 10^{10}$$

Answer

$$8.6 $$

Answer

$$1.96 	imes 10^{8}$$

Question 4

The value of $$\sqrt{k}$$ lies between $$2.2$$ and $$2.3$$.

Select the possible value of $$k$$.

Accepted Answer

Covalent bond

Answer

$$5.04$$

Answer

$$4.8$$

Answer

$$1.9$$

Answer

$$5.3$$

Question 5

Two equations are shown, where $$a>0$$.

$$a^{2}=\frac{1}{64}$$

$$b^{3}=a$$

What is the value of $$b$$ ?

Accepted Answer

Covalent bond

Answer

$$b=\frac{1}{2}$$

Answer

$$b=\frac{1}{8}$$

Answer

$$b=2$$

Answer

$$b=8$$

Ohio State Numbers And Operations Class 8 Maths Problems and Solutions

Many students find Numbers And Operations for Class 8 particularly challenging. Strengthen your concepts and gain confidence for your exams by solving free questions for Numbers And Operations from Ohio State for Class 8 preparation.