Factors, multiples and primes
Grade 4 · Level 3 · Sheet 1the answers
Free from tutor.in4me.app · 4.OA.B.4, 4.OA.C.5 · Five minutes a day online, and the difficulty follows your child.
- 1.Answer:
How many factor pairs does this number have?
48 - 2.Answer:
How many factor pairs does this number have?
36 - 3.Answer:
How many factor pairs does this number have?
100 - 4.Answer:
How many factor pairs does this number have?
50 - 5.Answer:
How many factor pairs does this number have?
40 - 6.Answer:
How many factor pairs does this number have?
24 - 7.Answer:
How many factor pairs does this number have?
80 - 8.Answer:
How many factor pairs does this number have?
96 - 9.Answer:
How many factor pairs does this number have?
45 - 10.Answer:
How many factor pairs does this number have?
60 - 11.Answer:
How many factor pairs does this number have?
64 - 12.Answer:
How many factor pairs does this number have?
42
Show the answer key
- 1.5
- 2.5
- 3.5
- 4.3
- 5.4
- 6.4
- 7.5
- 8.6
- 9.3
- 10.6
- 11.4
- 12.4
Answer key · Factors, multiples and primes · Level 3 · Sheet 1
- 1.5
- 2.5
- 3.5
- 4.3
- 5.4
- 6.4
- 7.5
- 8.6
- 9.3
- 10.6
- 11.4
- 12.4
The mistakes behind most wrong answers
A wrong answer in factors, multiples and primes is rarely random. These are the ones that come up most often, each on a real problem — worth knowing before you mark a sheet, because the fix for each is different.
How many factor pairs does this number have?
100The answer is 5. A child who answers 9 probably counted the factors instead of the pairs.
How many factor pairs does this number have?
45The answer is 3. A child who answers 2 probably left out one and the number itself.
How many factor pairs does this number have?
24The answer is 4. A child who answers 5 probably counted one too many or too few.
Is this number a multiple of 2?
50The answer is yes. A child who answers no probably missed a factor that was there.
In the app, every wrong answer is matched against mistakes like these, and the weekly email tells you which one your child keeps making — in those words, not as a percentage.