Exponents ICSE Class-7th Concise Selina Maths Solutions

Exponents ICSE Class-7th Concise Selina Maths Solutions Chapter-5. We provide step by step Solutions of Exercise / lesson-5 Exponents for ICSE Class-7 Concise Selina Mathematics. Our Solutions contain all type Questions with Exe-5 A and Exe-5 B, to develop skill and confidence. Visit official Website CISCE for detail information about ICSE Board Class-7.

Exponents ICSE Class-7th Concise Selina Maths Solutions Chapter-5

–: Select Topics :–

Exe-5 A,

Exe-5 B,

Exercise – 5 A Exponents ICSE Class-7th Concise Selina Maths Solutions

Question 1 :-

Find the value of:
(i) 6²
(ii) 7³
(iii) 4⁴
(iv) 5⁵
(v) 8³
(vi) 7⁵Answer :-

Question 2 :-

Evaluate:
(i) 2³ x 4²
(ii) 2³ x 5²
(iii) 3³ x 5²
(iv) 2² x 3³
(v) 3² x 5²
(vi) 5³ x 2⁴
(vii) 3²x 4²
(ix) (5 x 4)²

Answer :-

Question 3 :-

Evaluate:

Answer :-

Question 4 :-

Evaluate :

Answer :-

Question 5 :-

Which is greater :
(i) 2³ or 3²
(ii) 2⁵ or 5²
(iii) 4³ or 3⁴
(iv) 5⁴ or 4⁵

Answer :-

Question 6 :-

Express each of the following in exponential form :
(i) 512
(ii) 1250
(iii) 1458
(iv) 3600
(v) 1350
(vi) 1176

Answer :-

Question 7 :-

If a = 2 and b = 3, find the value of:
(i) (a + b)²
(ii) (b – a)³
(iii) (a x b)^a
(iv) (a x b)^b

Answer :-

Question 8 :-

Express:
(i) 1024 as a power of 2.
(ii) 343 as a power of 7.
(iii) 729 as a power of 3.

Answer :-

Question 9 :-

If 27 x 32 = 3^x x 2^y; find the values of x and y.

Answer :-

Question 10 :-

If 64 x 625 = 2^a x 5^b; find :
(i) the values of a and b.
(ii) 2^b x 5^a

Answer :-

Exercise – 5 B Exponents ICSE Class-7th Concise Selina Mathematics

Question 1 :-

Fill in the blanks:
(i) In 5² = 25, base = ……… and index = ……….
(ii) If index = 3x and base = 2y, the number = ………

Answer :-

(i) In 5² = 25, base = 5 and index = 2.

(ii) If index = 3x and base = 2y, the number = 2y^3x.

Question 2 :-

Evaluate:
(i) 2⁸ ÷ 2³
(ii) 2^3÷ 2⁸
(iii) (2⁶)⁰
(iv) (3^o)⁶
(v) 8³ x 8^-5 x 8⁴
(vi) 5⁴ x 5³ + 5⁵
(vii) 5⁴ ÷ 5³ x 5⁵
(viii) 4⁴ ÷ 4³ x 4⁰
(ix) (3⁵ x 4⁷ x 5⁸)⁰