Question
Exercise 1.2
- Write each of the numbers below as the product of its prime factors and then
write down the HCF and LCM in each case.
g) 6,8 and 12
write down the HCF and LCM in each case.
g) 6,8 and 12
Ask by Schofield Spencer. in South Africa
Jan 21,2025
Upstudy AI Solution
Tutor-Verified Answer
Answer
Here are the HCF and LCM for each pair of numbers:
-
a) 12 and 18
- HCF: 6
- LCM: 36
-
b) 10 and 20
- HCF: 10
- LCM: 20
-
c) 75 and 45
- HCF: 15
- LCM: 225
-
d) 24 and 60
- HCF: 12
- LCM: 120
-
e) 8, 4, and 12
- HCF: 4
- LCM: 24
-
f) 6, 10, and 15
- HCF: 1
- LCM: 30
-
g) 6, 8, and 12
- HCF: 2
- LCM: 24
Solution

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Extra Insights
To find the prime factorization, HCF (Highest Common Factor), and LCM (Lowest Common Multiple) of each set of numbers, let’s jump into the fun of prime factors, shall we?
a) Prime Factors:
- 12 = 2² × 3¹
- 18 = 2¹ × 3²
HCF = 6 (2¹ × 3¹)
LCM = 36 (2² × 3²)
b) Prime Factors:
- 10 = 2¹ × 5¹
- 20 = 2² × 5¹
HCF = 10 (2¹ × 5¹)
LCM = 20 (2² × 5¹)
c) Prime Factors:
- 75 = 3¹ × 5²
- 45 = 3² × 5¹
HCF = 15 (3¹ × 5¹)
LCM = 225 (3² × 5²)
d) Prime Factors:
- 24 = 2³ × 3¹
- 60 = 2² × 3¹ × 5¹
HCF = 12 (2² × 3¹)
LCM = 120 (2³ × 3¹ × 5¹)
e) Prime Factors:
- 8 = 2³
- 4 = 2²
- 12 = 2² × 3¹
HCF = 4 (2²)
LCM = 24 (2³ × 3¹)
f) Prime Factors:
- 6 = 2¹ × 3¹
- 10 = 2¹ × 5¹
- 15 = 3¹ × 5¹
HCF = 1 (no common prime factors)
LCM = 30 (2¹ × 3¹ × 5¹)
g) Prime Factors:
- 6 = 2¹ × 3¹
- 8 = 2³
- 12 = 2² × 3¹
HCF = 2 (2¹)
LCM = 24 (2³ × 3¹)
Reach for those calculators and get cracking on those quick multiplications. Doing prime factorization is not just math, it’s like solving a mystery with numbers!