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Q: What is the next number in the sequence 12 16 21 27?

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This is a sequence of perfect squares. 12=1, 22=4, 32=9, 42=16, 52=25. The next number is 62=36.

16

My guess: 2.5

A single number, such as 4642142824816 does not constitute a sequence.

17?

It would be 16. The sequence is doubling pairs. 3 and 4 go on to be 6 and 8. 6 and 8 would go on to be 12 and 16. 12 and 16 would go on to be 24 and 32, and so on.

The next number in the sequence 2, 4, 16, 64 is 256.

16 is the next squared number.

From the given sequence, the pattern appears to be 47-42=4, 42/3=14, 14*2=28, 28-4=24, 24/3=8, 8*2=16 and therefore the next number will be 16-4=12.

The next number in the sequence is... 64

a

You are multiplying each number in the sequence by -2. Therefore, the next number in the sequence after 32 is -64.

It looks like it is +6, -5, +12, -5. So I would assume the next number is +18, or 29.

The next number in this sequence should be 33.

If you mean: 1, 2, 4, 8 and 16 then the next number is 32

10. Then 12, 14, 16, 18, 20, 22, 24, etc.

A single number, such as 256196144100643616 does not represent a sequence.

8

65,536 is.

16 21 22 29

16

The pattern is +5, +6, +7, so the next number will be 23 + 8 or 31.

191 and then 420.

81

16