Find the missing number in the series: 2, 5,__ , 19 , 37, 75
1. 10 2. 9 3. 7 4. 8
- Deepshikha
- 09 जनवरी
- 1016 उत्तर
1016 उत्तर
1016 उत्तर
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2*2+1=5,5*2-1=9,9*2+1=19.. alternately0Modal content
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9 will be the Answer .The logic is:
2*2+1,5*2-1,9*2+1,19*2-1,37*2+1
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9 37*2+1=75 19*2-1=37 x*2+1=19 on solving x=9 9*2+1=19 5*2-1=9 2*2+1=50Modal content
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9
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after 2 terms series goes like this:
new term = (penultimate term)*2+previous term
so,9 is the answer0Modal content
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2*2+1=5 ,5*2-1=9,9*2+1=19,19*2-1=370Modal content
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