The answer for this looks wrong
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The answer for this looks wrong
We have a question in IPS practice and we think the answer in the book is wrong but here we go
Duncan is twice as old as Sebastian will be next year. Isabella is 8. Sebastian is three years older than Isabella was last year
How many years old is Duncan?
Duncan is twice as old as Sebastian will be next year. Isabella is 8. Sebastian is three years older than Isabella was last year
How many years old is Duncan?
Re: The answer for this looks wrong
Sometimes use a timeline, but hard to draw on here, this question suits,sherry_d wrote:We have a question in IPS practice and we think the answer in the book is wrong but here we go
Duncan is twice as old as Sebastian will be next year. Isabella is 8. Sebastian is three years older than Isabella was last year
How many years old is Duncan?
d = 2 (s+1)
i = 8
s = i + 3 -1
so s = 8 + 3 -1 = 10
so d = 2 (10+1)
d=22
Maybe ignore the brackets and stick to phrases.
How did I score?
steve
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Re: The answer for this looks wrong
Isabella was 7 last yearsherry_d wrote:We have a question in IPS practice and we think the answer in the book is wrong but here we go
Duncan is twice as old as Sebastian will be next year. Isabella is 8. Sebastian is three years older than Isabella was last year
How many years old is Duncan?
Sebastian is now 3 years older than Isabella was ie 10
Next year seb will be 11
so duncan is 11*2 now
Actually 22 is the right answer ....I got vexed a bit where it says Duncan is twice as old as Sebastian will be next year.
I took it Duncan will be 20next year less the one year which is obviously wrong.
But the book still got it wrong. The answers they have are 15, 12, 18, 14, 16 and 14 being the answer
I took it Duncan will be 20next year less the one year which is obviously wrong.
But the book still got it wrong. The answers they have are 15, 12, 18, 14, 16 and 14 being the answer
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