Latest Infosys Aptitude Question SOLUTION: the next sequence is 29/55

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(#M40017648) INFOSYS question "1/0,3/1,7/3,13/8,19/21,?" Keep an EYE

the next sequence is 29/55

Asked In Infosys seema (11 years ago)

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Vinay Sipani   (11 years ago)

Same answer 29/55 with some changes

Numerator => 1 , 3 , 7 , 13 , 19 , 29 ----> Same reason...

Denominator => 0 , 1 , 3 , 8 , 21 , x

nth term = 3*(n-1)th - (n-2)nd
3 = 3*1 - 0
8 = 3*3 - 1
21 = 3*8 - 3
=> x = 3*21 - 8 = 55

=> next term = 29/55

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Vinay Sipani   (11 years ago)

numerator => 1,3,7,13,19,29

Alternate prime numbers
1 , (2) , 3 , (5) , 7 , (11) , 13 , (17) , 19 , (23) , 29

i.e. prime numbers in brackets are omitted.

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nitish sukhija  (11 years ago)

ans is 29/52.
here numerator=1,3,7,13,29 same reason
denominator= here sum of num. of first no. and dum. of second no. - 0 =diff of dum of second and third.
this way sum of num. of 2nd and dum of 3rd no. -1=diff of dum of 3rd nd 4th no.
..sum of num. of 3rd nd dum of 4th -2 =diff of dum 4th nd 5th .. sum of num. of 4th nd num. of 5th-3=diff of dum of 5th nd 6th which is 13+21-3=31 so next dum is 21+31=52
so ans is 29/52

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glory agarwal  (11 years ago)

plz explain numerator series

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