What is the highest common factor of 420?
Answer: Factors of 420 are 1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420. There are 24 integers that are factors of 420. The greatest factor of 420 is 420. 4.
What is the HCF of 4 and 28?
4
Answer: GCF of 4 and 28 is 4.
What are the common factors of 420?
The factors of 420 are 1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20 , 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210 and 420.
What is the highest common factor of 28 and?
FAQs on GCF of 28 and 32 The GCF of 28 and 32 is 4. To calculate the GCF of 28 and 32, we need to factor each number (factors of 28 = 1, 2, 4, 7, 14, 28; factors of 32 = 1, 2, 4, 8, 16, 32) and choose the greatest factor that exactly divides both 28 and 32, i.e., 4.
What is the factor tree for 28?
1 is the smallest factor of every number. 28 is an even number. Hence, 2 is one of its factors….Positive pair factors of 28:
| Factors | Pair factors |
|---|---|
| 2 × 14 = 28 | (2, 14) |
| 4 × 7 = 28 | (4, 7) |
| 7 × 4 = 28 | (7, 4) |
| 14 × 2 = 28 | (14, 2) |
How do I find the highest common factor?
The highest common factor is found by multiplying all the factors which appear in both lists: So the HCF of 60 and 72 is 2 × 2 × 3 which is 12. The lowest common multiple is found by multiplying all the factors which appear in either list: So the LCM of 60 and 72 is 2 × 2 × 2 × 3 × 3 × 5 which is 360.
What are multiples of 420?
Solution: The first 10 multiples of 420 are 420, 840, 1260, 1680, 2100, 2520, 2940, 3360, 3780 and 4200. Therefore, Sum of first 10 multiples: 420 + 840 + 1260 + 1680 + 2100 + 2520 + 2940 + 3360 + 3780 + 4200 = 23100.
What is the LCM of 420?
The first 5 multiples of 420 are 420, 840, 1260, 1680, 2100. The sum of the first 5 multiples of 420 is 6300 and the average of the first 5 multiples of 420 is 1260….List of First 20 Multiples of 420.
| 420 × 1 = 420 | 420 × 11 = 4620 |
|---|---|
| 420 × 2 = 840 | 420 × 12 = 5040 |
| 420 × 3 = 1260 | 420 × 13 = 5460 |
| 420 × 4 = 1680 | 420 × 14 = 5880 |
How do you find the HCF of two numbers?
First, divide the large number by a small number. If the remainder is left, then divide the first divisor by remainder. If the remainder divides the first divisor completely, then it is the HCF or highest common factor of the given two numbers.
What is a factor pair of 28?
To find the factor pairs, multiply the two numbers to get 28. 1 × 28 = 28, making (1, 28) the first pair factor of 28. Next, 2 × 14 = 28, so (2, 14) is a pair factor of 28; and 4 × 7 = 28, making (4, 7) another pair factor of 28.
What HCF means in math?
Highest common factor
A common factor is a factor that is shared by two or more numbers. For example, a common factor of 8 and 10 is 2, as 2 is a factor of 8, and 2 is also a factor of 10. The highest common factor (HCF) is found by finding all common factors of two numbers and selecting the largest one.