Q: What is the sequence 3 9 4 5 25 20 21 441?

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22

Arithmetic

436 is the best choice for the next number in the sequence because:3x3=9-5=45x5=25-5=2021x21=441-5=436The Pattern: Square the term, then take away 5, add one, and square it again, and so on.

20, 21, 22, 24, 25

20, 21, 22, 24, 25

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21 441 22 23 529 506

3 9 4 5 25 20 21 441 ?

That question is unanswerable.

You seem to be unaware of the fact that you could have obtained the answer much more easily and quickly by using the calculator that comes as part of your computer. sqrt(441/625) = sqrt(441)/sqrt(625) = 21/25 = 0.84

22

20, 21, 22, 23, 24, 25, 26, 27, 28, 29

Arithmetic

Factors of 1225: 1 5 7 25 35 49 175 245 1225 Factors of 441: 1 3 7 9 21 49 63 147 441 The GCF of 1225 and 441 is 49

436 is the best choice for the next number in the sequence because:3x3=9-5=45x5=25-5=2021x21=441-5=436The Pattern: Square the term, then take away 5, add one, and square it again, and so on.

20, 21, 22, 24, 25

25 is the next number that appears in that sequence.

20, 21, 22, 24, 25