What is the prime factor form of ninety?
A2 times 2 times 3 times 5
B3 times 3 times 5 times 5
C2 times 3 times 3 times 5
D2 times 3 times 5 times 5
Answer & Solution
Correct answer: C. 2 times 3 times 3 times 5
1. Ninety is thirty times three.
2. Thirty is two times three times five.
3. The prime factor form of 90 is 2 times 3 times 3 times 5.
4. So the answer is 2 times 3 times 3 times 5.
_Source: NCERT Class 8 Mathematics, Ch 12 'Factorisation'_
Related questions
Where did you first learn about factors?Which word marks a factor that cannot break down further?In the regrouping example, the first two terms share:Algebraic expressions can be expressed as products of their:Besides thirty itself, which number is also a factor of thirty?To divide one polynomial by another, we factorise both and:How many identities are used for factorising here?In the regrouping example, the last two terms share a factor of: