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Maths Puzzle
2,5,9,19,37,?
Read Solution (Total 5)
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- Ans is 75
here in this series c=2a+b
2*2+5=9
2*5+9=19
2*9+19=37
2*19+37=75
- 11 years agoHelpfull: Yes(4) No(0)
- the series goes like this: (*2)+1,(*2)-1,(*2)+1 and so on.
(2*2)+1=5, (5*2)-1=9, (9*2)+1=18 and so on. when we reach 37, its (37*2)+1=75 - 11 years agoHelpfull: Yes(2) No(0)
- 75
2*2=4+1=5
5*2=10-1=9
9*2=18+1=19
19*2=38-1=37
37*2=74+1=75 - 11 years agoHelpfull: Yes(1) No(0)
- 9 is odd since it is not a prime no.
- 11 years agoHelpfull: Yes(1) No(0)
- series *2+1, *2-1
2*2+1,5*2-1,9*2+1,19*2-1,37*2+1
ans=75
- 11 years agoHelpfull: Yes(0) No(0)
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