ML Aggarwal Exponents and Powers MCQs Class 7 ICSE Maths Solutions
ML Aggarwal Exponents and Powers MCQs Class 7 ICSE Maths Solutions. We Provide Step by Step Answer of MCQs Questions for Exponents and Powers as council prescribe guideline for upcoming board exam. Visit official Website CISCE for detail information about ICSE Board Class-7.
ML Aggarwal Exponents and Powers MCQs Class 7 Maths Solutions
Board | ICSE |
Publications | Avichal Publishig Company (APC) |
Subject | Maths |
Class | 7th |
Chapter-4 | Exponents and Powers |
Writer | ML Aggarwal |
Book Name | Understanding |
Topics | Solution of MCQs |
Edition | 2023-2024 |
Exponents and Powers MCQs
ML Aggarwal Class 7 ICSE Maths Solutions
Page-98
Mental Maths
Question 1. Fill in the blanks:
(i) In the expression (-5)9, exponent = ……… and base = ………..
(ii) If the base is −3/4 and exponent is 5, then exponential form is ………
(iii) The expression (x2y5)3 in the simplest form is ………
(iv) If (100)0 = 10n, then the value of n is ……..
(viii) 35070000 = 3.507 × 10….
(ix) If (-2)n = -128, then n = ……..
Answer:
(i) In the expression (-5)9, exponent = 9 and base = -5
(ii) If the base is −3/4 and exponent is 5, then exponential form is (-3/4)5
(iii) The expression (x2y5)3 in the simplest form is (x2)3×(y5)3 = x6y15
(iv) If (100)0 = 10n, then the value of n is 0
(viii) 35070000 = 3.507 × 107
(ix) If (-2)n = -128, then n = (-2)7
Question 2. State whether the following statements are true (T) or false (F):
(i) If a is a rational number then am × an = am×n
(ii) 23 × 32 = 65.
(iii) The value of (-2)-3 is −1/8.
(iv) The value of the expression 29 × 291 – 219 × 281 is 1.
(v) 56 ÷ (-2)6 = −5/2
(vi) 50 × 30 = 80
(vii) 23/ 7<(2/7)3
(viii) (10 + 10)4 = 104 + 104.
(ix) x0 × x0 = x0 ÷ x0, where x is a non-zero rational number.
(x) 49 is greater than 163.
(xi) xm + xm = x2m, where x is a non-zero rational number and m is a positive integer.
(xii) (4/3)5×(5/7)5=(.4⁄3+.5⁄7)5
Answer:
(i) If a is a rational number then am × an = am×n False
(ii) 23 × 32 = 65. False
(iii) The value of (-2)-3 is −1/8. True
(iv) The value of the expression 29 × 291 – 219 × 281 is 1. False
(v) 56 ÷ (-2)6 = −5/2 False
(vi) 50 × 30 = 80 True
(vii) 23/ 7<(2/7)3 False
(viii) (10 + 10)4 = 104 + 104. False
(ix) x0 × x0 = x0 ÷ x0, where x is a non-zero rational number. True
(x) 49 is greater than 163. True
(xi) xm + xm = x2m, where x is a non-zero rational number and m is a positive integer. False
(xii) (4/3)5×(5/7)5=(.4⁄3+.5⁄7)5 False
Exponents and Powers MCQs
ML Aggarwal Class 7 ICSE Maths Solutions
Page-99
Choose the correct answer from the given four options (3 to 12)
Question 3. a × a × a × b × b × b is equal to
(a) a3b2
(b) a2b3
(c) (ab)3
(d) a6b6
Answer:
(c) (ab)3
Question 4. (-2)3 × (-3)2 is equal to
(a) 65
(b) (-6)6
(c) 72
(d) -72
Answer:
(d) -72
Question 5. The expression (pqr)3 is equal to
(a) p3qr
(b) pq3r
(c) pqr3
(d) p3q3r3
Answer:
(d) p3q3r3
Question -6.
Answer:
Question- 7.
Answer:
Question 8. The value of (530 × 520) ÷ (55)9 in the exponential form is
(a) 5-5
(b) 55
(c) 550
(d) 595
Answer:
(b) 55
Question 9. The law (𝑎/𝑏)n=an /bn does not hold when
(a) a = 3, b = 2
(b) a = -2, b = 3
(c) n = 0
(d) b = 0
Answer:
(d) b = 0
Question -10
Answer:
Question -11.
Answer:
Question -12. The value of 5-1 – 6-1 is
(a) 1/30
(b) −1/30
(c) 30
(d) -30
Answer:
(a) 1/30
Question- 13. The value of (6-1 – 8-1)-1 is
(a) −1/2
(b) -2
(c) 1/24
(d) 24
Answer:
(d) 24
Exponents and Powers MCQs
ML Aggarwal Class 7 ICSE Maths Solutions
Page-100
Question -14.
![Question -14.]()
Answer:
Question -15. If 23 + 13 = 3x, then the value of x is
(a) 0
(b) 1
(c) 2
(d) 3
Answer:
(c) x = 2
(ML Aggarwal Exponents and Powers MCQs Class 7 ICSE Maths Solutions)
Question 16. The standard form of 751.65 is
(a) 7.5165 × 102
(b) 75.165 × 101
(c) 7.5165 × 104
(d) 7.51 × 102
Answer:
(a) 7.5165 × 102
Question -17. The usual form of 5.658 × 105 is
(a) 5658
(b) 56580
(c) 565800
(d) 5658000
Answer:
5.658 × 105 = 565800 (c)
Question- 18. Which of the following numbers is in the standard form?
(a) 26.57 × 104
(b) 2.657 × 104
(c) 265.7 × 103
(d) 0.2657 × 106
Answer:
(b) 2.657 × 104
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