Answer / niks_shs

3*2-1=5
5*2-2=8
8*2-3=13
13*2-4=22
22*2-5=39
39*2-6=72

so series is 3,5,8,13,22,39,72

24 should be replaced by 22
24 is wrong.......

Answer / anirban bose

24 is the wrong answer.
5=3*2-1
8=5*2-2
13=8*2-3
22=13*2-4
39=22*2-5
72=39*2-6

So it should be 22 in place of 24.

Answer / brijesh

The wrong Number is 24.

Lets see how....

Given series of no. is.. 3, 5, 8, 13, 24, 39, 72

3*2-1 = 5

5*2-2 = 8

8*2-3 = 13

13*2-4= 22

22*2-5= 39

39*2-6= 72


So here we can see that 4th no. of serious will be 22 not 24.

Answer / tarun gavel

24 is wrong, this is series like 2^0+2=2,
2^1+2=3....2^3+5=13, 2^4+6=22, 2^5+7=39.
So answer is- 24 is wrong number.

Answer / guest

ans.5
Series is like
3+5=8
5+8=13
8+13=21

so 24 is the wrong number.

Answer / n.v.kiran

THE WRONG NUMBER IS 24 BECAUSE IF U OBSERVE SECOND NUMBER 5
IT IS OBTAINED BY MULTIPLYING FIRST BY 2 AND SUBSTRACTING
BY 1.SIMILARLY,8 IS OBTAINED BY 5*2-2=8. S0 TEH SEQUENCE IS
3 5((3*2)-1) 8((5*2)-2) 13((8*2))-3) 22((13*2)-4) 39((22*2)-
5) 72((39*2)-6).
SO 22 IS THE CORRECT ANSWER.

Answer / chetan mekha

3*2=6
6-1=5
5*2=10
10-2=8
8*2=16
16-3=13
13*2=26
26-4=22 so 24 is incorrect number in series (all correct plz)
22*2=44
44-5=39
39*2=78
78-6=72

Answer / sunil902

24 is wrong number

Answer / jagmeet singh

101

Answer / karthikeyan

The wrong Answer is 39.
Bcoz
5-3=2 2 is a prime number
8-5=3 3 is a prime number
13-8=5 5 is a prime number
24-13=11 11 is a prime number
39-24=15 15 is not a prime number

So after 11 the next prime number is 17. If we are add 24
with 17 we will get 41. Then we sunstract 72-41=31 is the
prime number.

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