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primary 5 | Maths
| Whole Numbers
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Hi i dont quite umderstand the question can someone help me? would be appreciated!
Date Posted: 5 years ago
Views: 430
Mr Lee : 56 years old
Sam : 4 years old
Difference = 56 - 4 = 52 years
When Mr Lee is 5 times as old as Sam, the difference in their age is still 52 years as it doesn't change.
So Mr Lee → 5u
Sam → 1u
Difference → 5u - 1u = 4u
4u = 52 years
1u = 52 ÷ 4 = 13 years
Mr Lee's age at that time
= 5 x 13 years
= 65 years
Since he is now 56 years old,
65 - 56 = 9
It will be in 9 years' time
Sam : 4 years old
Difference = 56 - 4 = 52 years
When Mr Lee is 5 times as old as Sam, the difference in their age is still 52 years as it doesn't change.
So Mr Lee → 5u
Sam → 1u
Difference → 5u - 1u = 4u
4u = 52 years
1u = 52 ÷ 4 = 13 years
Mr Lee's age at that time
= 5 x 13 years
= 65 years
Since he is now 56 years old,
65 - 56 = 9
It will be in 9 years' time
See 1 Answer
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Hope this helps
Date Posted:
5 years ago
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