number patterns

[grizzy]

Help with 4thgrade number patterns. Istructions states: complete the number sequences with the values that should come next.....5, 15,8,24,17,51,44,132, 125

 

[grizzy]

4th grade math. If I cannot figure this out, how can I expect my daughter to?

Please help. We are doing number patterns. Instructions are complete the number sequences with the values that should come next.
3657,1219,1227,409,417,139,147,49,57,___, ___, ___

 

[lookagain]

Help with 4thgrade number patterns. Istructions states: complete the number sequences with

the values that should come next.....5, 15, 8, 24, 17, 51, 44, 132, 125

grizzy, as with any of these, there are an infinite number of possibilities, *except*,

for instance, in the cases where the problem states what kind of sequence you're dealing with.

In this case, you're supposed to figure/use "detective work"/use educated guesses as to what

the problem poser wants.

My thought process might go like this:

What do I do to the first number in the list, 5, to get to 15?

(Do I add 10? Maybe? Or maybe I multiply 5 by 3 to get to 15.)


What do I do to 15 to get to 8?

Do I subtract 7? (I would think this is likely so, because 8 doesn't divide 15.)

But adding 10 to 8 doesn't get me 24. Nor does adding twice 10 to 8 get me 24,

so I think after all that the first number, 5, was multiplied by 3 to get 15.

And then 15 - 7 resulted in 8 looks natural to me.



grizzy, what happens if you try that with 8? That is, what if you multiply 8 by 3,

and then subtract 7 from that result (product)? And then, can you keep continuing

on in this way until you get to the next numbers in the list?