Question

Find The missing term in series ?
5 2 12 7 23 12 ? 17 57
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Answer 1

Answer:

Missing Term is 80

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