Quiz about Wisechamps Grade 7 Exponents and Powers (Worksheet 4)

Question 1

What is the value of $$\left(3^0-4^0 ight)\ imes5^2$$

Accepted Answer

0

Answer

25

Answer

-25

Answer

1

Question 2

Find the value of $$2°+30+4°$$ .

Accepted Answer

32

Answer

3

Answer

42

Answer

71

Question 3

Write $$a imes a imes a imes c imes c imes c imes c imes d imes d$$ in exponential form.

Accepted Answer

$$a^3 imes c^4 imes d^2$$

Answer

$$a^4 imes c^3 imes d^2$$

Answer

$$a^3 imes c^2 imes d^3$$

Answer

$$a^3 imes c^3 imes d^3$$

Question 4

We have $$(-11)^2 imes(-11)^4=(11)^x.$$ What is the value of x?

Accepted Answer

6

Answer

-2

Answer

4

Answer

0

Question 5

How is 65950 expressed in standard form?

Accepted Answer

$$6.595 imes10^4$$

Answer

$$6.595 imes10^{-4}$$

Answer

$$65.95 imes10^3$$

Answer

$$65.95 imes10^4$$

Question 6

On Simplifying $$\frac{\left(9m^2 ight)^{\frac{1}{3}}}{6^4} imes\frac{\left(4n^2 ight)^{\frac{1}{3}}}{5m}$$ , we get

Accepted Answer

$$\left(\frac{1}{5}\right)\left(\frac{n^{\frac{2}{\frac{3}{3}}}}{3^{10}2^{10}m^{\frac{1}{3}}}\right)^{ }$$

Answer

$$\frac{1}{5}\left(\frac{n^2 imes2^6}{3^{10}m^{\frac{1}{3}}} ight)$$

Answer

$$\left(\frac{3^62^6n^2}{5m}\right)^{\frac{1}{3}}$$

Answer

None of these

Question 7

Simplify and leave the answer in exponent form:

$$\left(\frac{6}{7} ight)^{-2} imes\left(\frac{7}{6} ight)^{-2}$$

Accepted Answer

1

Answer

$$\frac{7}{6}$$

Answer

$$-\left(\frac{6}{7}\right)$$

Answer

$$\left(\frac{6}{7}\right)$$

Question 8

Which of the following statements is true?

Statement-1: If $$x=\left(\frac{2}{3} ight)^4\div\left(\frac{2}{3} ight)^2$$ then value of $$x^2+2x+3=0$$ .

Statement-2: If $$\left(-\frac{1}{2} ight)^4 imes\left(-2 ight)^8=\left(-2 ight)^{4x}$$ then x = 1.

Accepted Answer

Only Statement - 2

Answer

Only Statement - 1

Answer

Both

Statement - 1

and Statement - 2

Answer

Neither Statement - 1 nor Statement - 2

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