GROWTH DEVELOPMENT CHILD
SUMMATIVE ASSESSMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Detailed explanation-1: -What is the Cube Root of 81? The cube root of 81 is the number which when multiplied by itself three times gives the product as 81. Since 81 can be expressed as 3 × 3 × 3 × 3. Therefore, the cube root of 81 = ∛(3 × 3 × 3 × 3) = 4.3267.
Detailed explanation-2: -Square Root of 81 by Prime Factorization Method We know that the prime factorization of 81 is 3 × 3 × 3 × 3. √81 = 3×3 = 9. Hence, the value of the square root of 81 is 9.
Detailed explanation-3: -The number 3 is a prime number. This implies that the number 3 is pairless and is not in the power of 2. Therefore, the radical form of square root of 3 cannot be simplified further.
Detailed explanation-4: -To simplify an expression containing a square root, we find the factors of the number and group them into pairs. For example, a number 16 has 4 copies of factors, so we take a number two from each pair and put it in front of the radical, finally dropped, i.e., √16 = √(2 x 2 x 2 x 2) = 4.