What is the missing number
Here's a puzzle to test your ability to find a pattern and test it against more data.
In this table, each row across follows the same pattern of numbers. See if you can discern the pattern and fill in the missing number in the bottom row. For added challenge (or competition), time how long it takes you to complete the puzzle. Then, pass it along to someone else and see if they can solve it faster. The slower one has to cook dinner!
7 4 8
3 9 7
6 5 10
? 8 4
In this table, each row across follows the same pattern of numbers. See if you can discern the pattern and fill in the missing number in the bottom row. For added challenge (or competition), time how long it takes you to complete the puzzle. Then, pass it along to someone else and see if they can solve it faster. The slower one has to cook dinner!
7 4 8
3 9 7
6 5 10
? 8 4
Labels: SharedPuzzle
posted by Mr Fahrenheit at
8:11 AM
13 Comments:
Nice one, took me a little longer than I thought i would. It's 3, but I'll leave the reasoning out so others can figure it out.
i thinkk its 9
Confused... are each set of 3 numbers seperate or do you string all the numbers together?
It says each row so you are right BOOBOO. Josh got the right answer, I will leave him the reasoning part.
9
I also found it to be 3, and yes took me longer than I thought (probably 5 minutes). The pattern?
Take the first two numbers and multiply them together. Take the result of that calculation, and strip off the "tens" digit (take the "ones" digit) to get the third number. Example would be 7 * 4 = 28... strip off the 2 and you are left with 8. All of the sequences follow that pattern. To get 3 as the answer, what number (between 1-10) multiplied by 8 gives you a result that has a 4 in the "ones" placeholder?
3!
It's 9 if I don't over think it.
when anonymous said Take the first two numbers and multiply them together. Take the result of that calculation, and strip off the "tens" digit (take the "ones" digit) to get the third number. Example would be 7 * 4 = 28... strip off the 2 and you are left with 8. All of the sequences follow that pattern. To get 3 as the answer, what number (between 1-10) multiplied by 8 gives you a result that has a 4 in the "ones" placeholder? they were almost right. You do multiply the first two numbers together but then you subtract 20 to get the third number, you'll notice that the third set of numbers ended in ten if you subtract the "tens" number you would have had zero.
well it was hard so i wrote it down n noticed a pattern and i thought the answer is one (1)
I am the one who posted the question. 9 is not the answer unless you can find a solution with it:))I was waiting for Josh to answer but I waited enough. I am not that patient:)) Original answer is 3.
7*4=28-8=20
3*9=27-7=20
6*5=30-10=20
(3)*8=24-4=20
Yup, that's exactly how I came up with it.
A*B-C = 20
What about 8 since 8 * 8 = 64 - 44 = 20
i say it's 11 because it goes 748 397 6510 and then ?84 the first one, last number second one middle,thirsd one last fourth one should be 11 now watch 8,9,10,then 11
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