alleryStart learning →The HCF of 12 and 18 is
A3
B2
C6
D9
Answer & Solution
Correct answer: C. 6
1. $12 = 2^2 \times 3$ and $18 = 2 \times 3^2$.
2. HCF = product of the lowest powers of common primes = $2^1 \times 3^1 = 6$.
3. So the HCF is 6.
_Source: Karnataka SSLC (KSEEB) Class 10 Mathematics, Ch8 'Real Numbers', §8.3_
Keep practising Real Numbers
Browse all Real Numbers questions for Karnataka SSLC (Class 10), or explore more Mathematics topics.
Related questions
Compare these factor totalsThe largest number that divides both 60 and 96 exactly (their HCF) isThe decimal expansion of an irrational number isThe sum of a rational number and an irrational number is alwaysThe product of the HCF and LCM of the numbers 8 and 20 isThe prime factorisation of 140 isUsing Euclid's algorithm, the HCF of 96 and 404 isIf the HCF of two numbers is 9 and their LCM is 90, and one number is 18, the other number