1, 1, 2, 3, 5, 8, 13, ..... Sum of 9th and 10th terms of above series is:

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27 Feb 2017 Series

1, 1, 2, 3, 5, 8, 13, .....
Sum of 9th and 10th terms of above series is:

OPtion

1) 21
2) 34
3) 45
4) 55
5) 72
6) 87
7) 89
8) 91
9) 144
10)None of these

Solution

First 10 Fibonacci series:
1, 1, 2, 3, 5, 8, 13, 21, 34, 55
Sum of 9th and 10th term = 34 + 55 = 89

Option 7)

Correct Option: 7 Best Solution (14)

G.S.Kantharao   7 years AGO

The series is 1,1,2,3,5,8,13,..In this every term is sum of two successive professorsThen the series is 1,1,2,3,5,8,13,21,34,55..
Sum of 9th and 10th terms=89.
Hence the right option is 7

Like? Yes (3) | No (1)  

Sonu Kumar   7 years AGO

0+1=1
1+1=2
1+2=3
2+3=5
3+5=8
5+8=13
8+13=21
13+21=34
21+34=55
So 9th term is 34 and 10th term is 55 so sum of these is 34+55=89
so correct answer is 7) 89

Like? Yes (2) | No (1)  

Karan   7 years AGO

It's Fibonacci series.
1,1,2,3,5,8,13
8 th, 9th and 10th terms are 21,34,55.
sum of 34 & 55 is 89.

Like? Yes (1) | No (1)  

madanpal vishwakarma    7 years AGO

Here the every term is the sum of previous two term like fibonacci series but starting form 1

1,1,2,3,5,8,13,21,34,55 ...

so the sum of 9th and tenth term is 34+55 =89

Like? Yes (1) | No (1)  

yamini velaga   7 years AGO

every term in the series is given by the sum of preceeding two terms
1,1,2,3,5,8,13,...----------》》
1,1,(1+1=2), (2+1 = 3), (3+2= 5), (5+3=8),...
8th term = 13+8=21
9th term = 21 + 13 = 34
10th term = 34+21 = 55
sum of 9th & 10th terms is (34 + 45) = 89

Like? Yes (1) | No (1)  

Nitish kesarwani   7 years AGO

since its fabonacci seris
so series is 1,1,3,5,8 13 21 34 55 89
hence optn 7

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maruthi b j   7 years AGO

First term+ second term= third term, second term + third term= fourth term,, and it continues

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Vinay Kumar Kadimi   7 years AGO

series go like this :
1+1=2 3rd term
1+2=3 4th term
.
3+5=8 6th term
.
13+8=21 8th term
21+13=34 9th term
34+21=55 10th term

9th term+10th term= 34+55 = 89

Like? Yes (1) | No (1)  

Harsh Poddar   7 years AGO

The series is 1,1,2,3,5,8,13,21,34,55
Sum of 9th and 10th term is 34+55=89
Option 7

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Siva   7 years AGO

8th term 21
9th term 34
10th term 55
Sum of 9th and 10th is 89

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DIVYANSHU SHEKHAR   7 years AGO

1+1=2, 1+2=3, 3+5=8, 5+8=13, 8+13=21,21+13=34,34+21=55
34+55=89

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sindhu   7 years AGO

Fibonacci series
9th term 21+13=34
10th term=34+21=55
Result=34+55=89

Like? Yes | No (1)  

shashikanth reddy palla   7 years AGO

13+8=21
21+13=34
34+21=55
sum of 9 th and 10 th =34+55=89

Like? Yes | No (1)  

KARTIK CHOUDHARY   7 years AGO

9th term is 34 and 10 term is 55 fibonacci series so
sum is 34+55=89

Like? Yes | No (1)