Difficulty with a Type Z example

Bad Dad · Post by **Bad Dad** » Mon Oct 08, 2007 8:55 am

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?

Good Son put 22. I think it is 22, but IPS answer book says 14.

D = 2((8-1+3)+1)
D = 2 * 11

Please put me out of my misery and tell me the book is wrong or I am mathematically challenged!

Guest · Post by **Guest** » Mon Oct 08, 2007 10:13 am

I agree that you are correct. We completed the IPS papers (VR,NVR,Maths) recently and found quite a few errors. Which paper was the example from? I wondered what my son had given as the answer and had a quick look through the papers but could not find it.

Bad Dad · Post by **Bad Dad** » Mon Oct 08, 2007 11:03 am

It is in the IPS VR Method and Technique book. It is question 38 from Practice Paper B.

Guest · Post by **Guest** » Mon Oct 08, 2007 11:08 am

Thanks

We never bought the book - so that will be why I couldn't find the question!!

Ed's mum · Post by **Ed's mum** » Mon Oct 08, 2007 5:53 pm

Yeah, according to my calculations...definitely 22.

sivaji1 · Post by **sivaji1** » Sun Oct 14, 2007 9:19 pm

Difficulty with a Type Z example

Difficulty with a Type Z example

thx.