What is the smallest number by which 2916 will be divided so that the quotient is a perfect cube?
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Prime factorising 2916, we get, 2916=2×2×3×3×3×3×3×3 =2 2 ×3 6 . We know, a perfect cube has multiples of 3 as powers of prime factors. Here, number of 2’s is 2 and number of 3’s is 6. So we need to multiply another 2 in the factorization to make 2916 a perfect cube. Hence, the smallest number by which 2916 must be multiplied to obtain a perfect cube is 2. please mark it brainliest Extra Questions for Class 8 Maths Chapter 7 Cubes and Cube Roots Question 1. Question 2. Question 3. Question 4. Question
5. (ii) We have 864 = 2 × 2 × 2 × 2 × 2 If we form triplet of equal factors, the number 2 and 3 form a group of three whereas another group of 2’s does not do so. Therefore, 864 is not a perfect cube. Question 6. Question 7. Question 8. Question 9. Question 10. Solution: Cubes and Cube Roots Class 8 Extra Questions Short Answers TypeQuestion 11. Solution: Question 12. Question
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14. Solution: Extra Questions for Class 8 MathsNCERT Solutions for Class 8 MathsWhat is the smallest by which 2916 should be divided so that quotient is a perfect cube?Therefore, the required smallest number by which 2916 should be divided to make it a perfect cube is 2 × 2 = 4, i.e., 2916 ÷ 4 = 729 which is a perfect cube.
What is the perfect cube of 2916?2916 doesn't have a perfect cube.
What is the smallest number by which we divide 6912 so that the quotient becomes a perfect cube find the cube root of the quotient?Given: A number 6912 . To do: To find the smallest number by which 6912 must be divided so that the number formed is a perfect cube. Therefore, we should divide 6912 by 22=4 2 2 = 4 , the smallest number to get 1728 which is a cube of 12 .
What is the smallest number by which 8640 may be divided so that the question is a perfect cube?Hence 5 is the smallest number by which 8640 must be divided so that the quotient is a perfect cube.
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