Introduction of Numbers in Exponential Form

Q. In a morning walk, three friends step off together. Their steps measure 80 cm, 85 cm and 90 cm respectively. Find the minimum distance each friend should walk so that all can cover the same distance in complete steps.

1. 95 m
2. 122.4 m
3. 105.5 m
4. 56 m

Q.

What to the power of $4$ equals $81$?

Q.

If the HCF of 60 and 168 is 12, what is the LCM?

1. 480

2. 420

3. 240

4. 840

Q.

In representation of 2 to the power of n, what is n called?

1. Base

2. Exponent

3. Constant

4. Inverse

Q. Question 2 (i)
Find the LCM and HCF of the following pairs of integers and verify that LCM $\times$ HCF = product of the two numbers.
26 and 91

Q. Question 2 (ii)
Find the LCM and HCF of the following pairs of integers and verify that LCM $\times$ HCF = product of the two numbers.
510 and 92

Q. In the given figure, each small square represents $2^0$.
Which of the following combinations of colours represent $2^3$?

1. Yellow, blue and red
2. Yellow, dark green, blue and purple
3. Blue, purple, red and light green
4. Purple and light green

Q.

For the statement $0÷b,$ the value of b can be any whole number.

1. True
2. False

Q. If the HCF of (306, 657) = 9, find LCM of (306, 657).

1. $22330$
2. $22350$
3. $22346$
4. $22338$

Q.

Which of the following statements are true ?

${\left(-\frac{4}{9}\right)}^2=-\frac{16}{81}$.

1. True
2. False

Q.

Given that HCF of $(306,657)$ $=9$, find LCM of $(306,657)$

Q.

Say true or false:

$(\frac{2}{5}{)}^2=-(\frac{2}{5}{)}^2$

1. True

2. False

Q.

In power notation, $\frac{81}{625}$ can be expressed as ___.

1. $(\frac{5}{3}{)}^4$

2. $(\frac{3}{5}{)}^4$

3. $(\frac{-3}{5}{)}^4$

4. $(\frac{3}{4}{)}^5$

Q. If $a\ne 0,$ then the value of $a^0$ is .

1. \N
2. 1
3. 2
4. -1

Q.

What is (91)^0?

1. 1

2. 0

3. 91

4. -91

Q.

What value of x makes "5 raised to the power x" equal to 25 ?

1. 5

2. -2

3. -5

4. 2

Q. Which of the four images represents $2^3$?

1. (A)
2. (B)
3. (C)
4. (D)

Q.

What is the value of 5 with an exponent of 3?

1. 25

2. 125

3. 625

4. 1325

Q.

The value of $a^0,a\ne 0,$ is zero.

1. True

2. False

Q. If we represent 343 in exponential form , then the base is and the exponent is .

1. 7
2. 3
3. 9
4. 19

Q. If $5^{m+2}$ $\times$ $5^4$ = $5^3$ , then $m$ = .

1. \N
2. -1
3. -4
4. -3