Question

21. Which number will come next?
2, 5, 12, 23, 38, 57,​

Answer 1

Answer:

5–2=3

12–5=7(3+4)

23–12=11(7+4)

38–23=15(11+4)

57–38=19(15+4)

So the difference is always increasing by 4

Therefore next difference should be 19+4=23

Now add 23+57=80 is the answer

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Answer 2

Answer:

80

Step-by-step explanation:

the difference forms an AP with difference 4