Noticing the numbers were oddly alternating between large and small, I gathered that the sum of a group of numbers would be equal to the sum of another group of numbers and thus I decided to test it out.

Group 1: 33 + 88 + 22 + 14 = 157

Group 2: 49 + 74 + 2 + 32 = 157

This means that the last two numbers would go seperately into each group and would have to be added to the occuring list which means:

Group 1: 157 + ? <----- this question mark must be 4.5

The problem is, 4.5 is incorrect because it isn't really a sequence as there's no relation to knowing what number goes next. If you know how the sequence works, you should be able to explain every number.

For example, in the sequence: 1,2,3,6,5,10,7,14, 9. Every alternating term goes up by 2 and every other term is doubled from the previous term. You can explain each number.

Nice solution Nina. Is this the correct answer? Because if the answer is supposed to be a sequence, this answer does not look like a sequence to me. For example, I can write the elements {A_{n}} in Nick's example in terms of A_{2k} = A_{2(k-1)} + 2, and A_{2k-1} = 2A_{2k-2}. For k = 1,2,3... assuming the first term A_{0} = 1. But I am not sure if I can express something similar in Nina's solution, or is it still a valid sequence?

I see i see. I think you have the correct answer now. I just expected there to be a recursion formula or that the elements are determined by some function because of the word "sequence", but i dont think so anymore x.x

The problem is, 4.5 is incorrect because it isn't really a sequence as there's no relation to knowing what number goes next. If you know how the sequence works, you should be able to explain every number.

For example, in the sequence: 1,2,3,6,5,10,7,14, 9. Every alternating term goes up by 2 and every other term is doubled from the previous term. You can explain each number.

Nina's one seems correct too but is neither a sequence either.

nr. 11nr. 54Do you have this in a exam ?

Lets try to find the answer together.

11 * 3

7 * 7

11 * 8

37 * 2

11 * 2

1 * 2

7 * 2

16 * 2

?

2.25 * 2

3+3=6

4+9=13

8+8=16

7+4=11

2+2=4

2+0=2

1+4=5

3+2=5

?

4.5

-------Forum ModeratorYES 2 PLUS 2 IS 4 GET IN DESTIN ROCK IT

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The answer is 4.5

33, 49, 88, 74, 22, 2, 14, 32, ?, 4.5

Noticing the numbers were oddly alternating between large and small, I gathered that the sum of a group of numbers would be equal to the sum of another group of numbers and thus I decided to test it out.

Group 1: 33 + 88 + 22 + 14 = 157

Group 2: 49 + 74 + 2 + 32 = 157

This means that the last two numbers would go seperately into each group and would have to be added to the occuring list which means:

Group 1: 157 + ? <----- this question mark must be 4.5

Group 2: 157 + 4.5

Therefore the answer is:

33, 49, 88, 74, 22, 2, 14, 32, 4.5, 4.5

Thank you

nr. 11nr. 54WoW,

SnowyXmas is genius ! Well done!

-------Forum ModeratorNo Destin, he/she is incorrect.

Clan:lipThe answer is 42

nr. 15nr. 72nr. 26Did you figure out the answer yet? Because I think I solved it :d

The problem is, 4.5 is incorrect because it isn't really a sequence as there's no relation to knowing what number goes next. If you know how the sequence works, you should be able to explain every number.

For example, in the sequence: 1,2,3,6,5,10,7,14, 9. Every alternating term goes up by 2 and every other term is doubled from the previous term. You can explain each number.

nr. 15nr. 72nr. 26Okay let me explain:

33, 49, 88, 74, 22, 2, 14, 32, ?, 4.5

You start from left, and separate each number, then multiply it and subtract with 2.

So 33 = 3*3/2 = 4.5 (first number from right)

49 = 4*9/2 = 18 (the ?)

88 = 8*8/2 = 32 (third number from right)

74 = 7*4/2 = 14 (fourth)

And 22 = 2*2/2 = 2 (fifth)

Now you got the explanation why ? has to be 18 ;d

If you solved that and it wasn't anyone else, well done, Nice nina

Eventually, my eyes were opened, and I really understood nature. I learned to love at the same time - Claude Monet

nr. 33Clan:cuteNice solution Nina. Is this the correct answer? Because if the answer is supposed to be a sequence, this answer does not look like a sequence to me. For example, I can write the elements {A

_{n}} in Nick's example in terms of A_{2k}= A_{2(k-1)}+ 2, and A_{2k-1}= 2A_{2k-2}. For k = 1,2,3... assuming the first term A_{0}= 1. But I am not sure if I can express something similar in Nina's solution, or is it still a valid sequence?nr. 15nr. 72nr. 26I got no idea if it's correct, but it's the best I could come up with xd

I studied maths at a high level in school and we often had similiar tasks to this one. Just with other numbers, not the exact same ones.

(Also I meant divide* not subtract (wasnt sure about the engliz word))

nr. 33Clan:cuteI see i see. I think you have the correct answer now. I just expected there to be a recursion formula or that the elements are determined by some function because of the word "sequence", but i dont think so anymore x.x

unholy' please go to tinder

Nina's one seems correct too but is neither a sequence either.

Takes a genius to realise it's not a sequence.. isnt that right nina