**Exponents **Class- 7th RS Aggarwal Exe-5 B Goyal Brothers ICSE Math Solution . We provide step by step Solutions of lesson-5 Exponents for ICSE Class-7 **Foundation RS Aggarwal Mathematics** of Goyal Brothers Prakashan . Our Solutions contain all type Questions of Exe-5 B to develop skill and confidence. Visit official Website **CISCE** for detail information about ICSE Board Class-7 Mathematics.

Laws of exponents with answers pdf multiple choice questions on exponents and powers pdf.

## Exponents Class- 7th RS Aggarwal Exe-5 B Goyal Brothers ICSE Math Solution

Board | ICSE |

Publications | Goyal brothers Prakashan |

Subject | Maths |

Class | 7th |

Chapter-5 | Exponents |

Writer | RS Aggrawal |

Book Name | Foundation |

Topics | Solution of Exe-5 B |

Academic Session | 2023 – 2024 |

**Exercise – 5 B**

**MULTIPLE CHOICE QUESTIONS**

Exponents Class- 7th RS Aggarwal Exe-5 B Goyal Brothers ICSE Math Solution

**Choose the correct option in each of the following :**

**1. 3**^{2} + 2^{3} is equal to :

^{2}+ 2

^{3}is equal to :

(a) 15

(b) 16

(c) 17

(d) 18

**Answer:** option **(c) 17** is correct.

**2. (7 – 5)**^{5} is equal to :

^{5}is equal to :

(a) 6

(b) 8

(c) 16

(d) 32

**Answer:** option **(d) 32** is correct.

**3. (-5)**^{5} is equal to :

^{5}is equal to :

(a) 20

(b) -125

(c) 625

(d) -1024

**Answer:** option **(c) 625** is correct.

**4. (-3/5)**^{5} is equal to :

^{5}is equal to :

(a) (-243/3125)

(b) (-81/625)

(c) (81/625)

(d) (512/1875)

**Answer:** option **(a) (-243/3125)** is correct.

**5. The value of x such that (3/7)**^{3} × (3/7)^{-8} = (3/7)^{2x+3} is :

^{3}× (3/7)

^{-8}= (3/7)

^{2x+3}is :

(a) -4

(b) -2

(c) 0

(d) 1

**Answer:** option **(a) -4** is correct.

**6. The value of [{(-1/3)**^{-2} }^{-1} ]^{2} is :

^{-2}}

^{-1}]

^{2}is :

(a) 81

(b) -81

(c) (1/81)

(d) -(1/81)

**Answer:** option **(c) (1/81)** is correct.

**7. The number 34613000 when expressed in exponential form is equal to :**

(a) 3461.3 × 10^{3}

(b) 3.4613 × 10^{7}

(c) 0.34613 × 10^{9}

(d) 34.613 × 10^{5}

**Answer:** option **(b) 3.4613 × 10 ^{7}** is correct.

**MENTAL MATHS **

Exponents Class- 7th RS Aggarwal Exe-5 B Goyal Brothers ICSE Math Solution

**1. Which is larger ?**

**(i) 2**^{3} or 3^{2}

^{3}or 3

^{2}

**Answer:** 3^{2}

**(ii) 2**^{5} or 5^{2}

^{5}or 5

^{2}

**Answer: **2^{5}

**(iii) 3**^{7} or 7^{3}

^{7}or 7

^{3}

**Answer:** 3^{7}

**2. Fill in the blanks :**

(i) In an exponential form x^{m} ; is called the **base**.

(ii) We have : a^{m}/a^{n} = (1/a^{n-m}) if **n > m**.

(iii) Any number to the power 0 is equal to** 1**.

(iv) The exponential form is also called **power notation**.

(v) The reciprocal of x^{a} is equal to x to the power **(-a)**.

**3. Write true (T) or false (F) :**

Statements |
True/False |

(i) For any non-zero number a, we have (a^{m})^{n} = a^{m+n} |
F |

(ii) If a and b are non-zero numbers, then {(a/b)^{m} }^{n} = (b/a)^{-mn} |
T |

(iii) For a non-zero number x; (x^{m} ×x^{n}) is equal to x to the power (m + n). |
T |

(iv) If a number p is multiplied n times, then the resulting number is p^{n} . |
T |

(v) In an exponential notation x^{n} ; n is called the index. |
T |

**— : end of Exponents Class- 7th RS Aggarwal Exe-5 B Goyal Brothers ICSE Math Solution:–**

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