Help!!!
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Re: Help!!!
Is this a Walsh one? I have just done one of these where the only answer was to use the middle number and I thought this is the wrong way to do these.
Re: Help!!!
This is a 3 stage operation which does come up occasionally.
There are 2 methods of finding the same answer 20.
(3[12]24) (6[24]36)
(5[ ? ]32)
Method 1
3 x 24 = 72
divide by number on the left plus 3
3 + 3 =6
72 divided by 6 = 12
6 x 36 = 216
divide by number on the left plus 3
6 + 3 = 9
216 divided by 9 = 24
5 x 32 = 160
divide by number on left plus 3
5 + 3 = 8
160 divided by 8 = 20
Method 2
3 x 24 = 72
divide the number on right by 4 = 6
72 divided by 6 = 12
6 x 36 = 216
divide the number on the right by 4 = 9
216 divided by 9 = 24
5 x 32 = 160
divide the number on the right by 4 = 8
160 divided by 8 = 20
Candy46, can you post the question?
Patricia
There are 2 methods of finding the same answer 20.
(3[12]24) (6[24]36)
(5[ ? ]32)
Method 1
3 x 24 = 72
divide by number on the left plus 3
3 + 3 =6
72 divided by 6 = 12
6 x 36 = 216
divide by number on the left plus 3
6 + 3 = 9
216 divided by 9 = 24
5 x 32 = 160
divide by number on left plus 3
5 + 3 = 8
160 divided by 8 = 20
Method 2
3 x 24 = 72
divide the number on right by 4 = 6
72 divided by 6 = 12
6 x 36 = 216
divide the number on the right by 4 = 9
216 divided by 9 = 24
5 x 32 = 160
divide the number on the right by 4 = 8
160 divided by 8 = 20
Candy46, can you post the question?
Patricia
Re: Help!!!
I didnt realise you could have 3 step operations!!! Nightmare!
(10{40}100) (5{35}80) (15{?]60)
answer is 15 which works with 1st plus 2nd number x 2
Thanks
(10{40}100) (5{35}80) (15{?]60)
answer is 15 which works with 1st plus 2nd number x 2
Thanks
Re: Help!!!
Careful, you must use the outside numbers to make the middle number.candy46 wrote:I didnt realise you could have 3 step operations!!! Nightmare!
(10{40}100) (5{35}80) (15{?]60)
answer is 15 which works with 1st plus 2nd number x 2
Thanks
So re-working your logic
100 halved = 50 less 10 =40
80 halved = 40 less 5 = 35
so
60 halved = 30 less 15 = 15
If you fall into the trap of using the middle number you can get in a right muddle, however sometimes as in this case it might give a clue but you must go back to using the two outside numbers to make the middle number.
Re: Help!!!
Excellent Thank you,it was a friend who told me the other way and I thought it was wrong and it was really bugging me, at least now I can see the right way to solve it.
Re: Help!!!
I got the answer 20, but used a different method -
right number - 12 = middle number.
to cross check i did left number x 4 = middle number.
right number - 12 = middle number.
to cross check i did left number x 4 = middle number.