Answer to a type 19 question please
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Answer to a type 19 question please
help please with this question,it is driving me mad as neither I nor my daughter could solve it.
2 ( 9 ) 5 , 4 (21) 5 , 5 ( ? ) 2
Many thanks
2 ( 9 ) 5 , 4 (21) 5 , 5 ( ? ) 2
Many thanks
stressedparent
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Re: Answer to a type 19 question please
Only thing that makes sense is...stressedparent wrote:help please with this question,it is driving me mad as neither I nor my daughter could solve it.
2 ( 9 ) 5 , 4 (21) 5 , 5 ( ? ) 2
Many thanks
2 ( 9 ) 5 ........... 2x2=4 then add the 5 =9
4 (21) 5 ........... 4x4=16 then add the 5 =21
5 ( ? ) 2 ........... 5x5=25 then add the 2= 27
therefore answer... 5 ( 27 ) 2
Re: Answer to a type 19 question please
hello I think it is
2 (9) 5 = 2x5-1
4 (21) 5 = 4 x 5 -1
therefore
5 ( 9) 2 = 5x2-1
Hope this is right all i can think of
Applepie
2 (9) 5 = 2x5-1
4 (21) 5 = 4 x 5 -1
therefore
5 ( 9) 2 = 5x2-1
Hope this is right all i can think of
Applepie
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Re: Answer to a type 19 question please
I would go for applepies method, as you must use the numbers either side of the brackets first.
Which publisher is this from? What was their answer?
Patricia
Which publisher is this from? What was their answer?
Patricia
Re: Answer to a type 19 question please
Applepies method doesn't work as you would have to add 1 to get 21 not - 1.
- would have used Bewildereds method so am suprised to hear that it is incorrect.
- would have used Bewildereds method so am suprised to hear that it is incorrect.
Re: Answer to a type 19 question please
Quite right too!
Going back to my siesta...
Will take another look later. Not saying Bewildered is incorrect.
Would be interested in the publisher and their answer.
Patricia
Going back to my siesta...
Will take another look later. Not saying Bewildered is incorrect.
Would be interested in the publisher and their answer.
Patricia
Re: Answer to a type 19 question please
I'd say bewildered's was correct as it does use the outside brackets first?
1. 2 squared +5 = 9
2. 4 squared + 5 = 21
3. 5 squared + 2 = 27
1. 2 squared +5 = 9
2. 4 squared + 5 = 21
3. 5 squared + 2 = 27
Re: Answer to a type 19 question please
Didn't the book have the answer somewhere?
Re: Answer to a type 19 question please
I think Bewildereds method is probably the answer , however it does not use the known technique of using the numbers either side of the brackets in the first instance. [squaring one the numbers is "doing" something to one of the numbers before you start]
However...
Patricia
However...
Patricia