In 28 - Think of the numbers that can be divided to 28.
Factors: 4x7 (4 is a composite number because it still has factor while 7 is a prime number)
4 = 2x2
Since 2 and 7 has no more factors your prime factors now are
2x2x7
In 35 the factors are 3x5 and both of them are prime numbers already.
In 40 the factors are 8 x 5
8 is a composite number and can be extracted to 4x2. If you look at it, 4 still can be extracted in 2x2 now copy all the prime numbers. You have 2x2x2x5
Answers & Comments
Answer:
1. 28 = 2x2x7
2. 35 = 5x7
3. 40 = 2x2x2x5
4. 56= 2x2x2x7
Step-by-step explanation:
In 28 - Think of the numbers that can be divided to 28.
Factors: 4x7 (4 is a composite number because it still has factor while 7 is a prime number)
4 = 2x2
Since 2 and 7 has no more factors your prime factors now are
2x2x7
In 35 the factors are 3x5 and both of them are prime numbers already.
In 40 the factors are 8 x 5
8 is a composite number and can be extracted to 4x2. If you look at it, 4 still can be extracted in 2x2 now copy all the prime numbers. You have 2x2x2x5
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