# Thread: What could be the next number in the following sequence?

1. YahooHoo
Join Date
Sep 2007
Posts
1

## What could be the next number in the following sequence?

3, 4, 7, 12, 19

2. YahooHoo
Join Date
Aug 2007
Posts
2
28:
the differences between consecutive pairs of terms(a2-a1, a3-a2 etc ) aere:
1,3,5,7.
the next difference is 9, os the desired next number=19+9=28. ANS.

3. YahooHoo
Join Date
Sep 2007
Posts
1
28
why

4-3=1
7-4=3
12-7=5
19-12=7
therefore
x-19=9
x=19+9
x=28

4. YahooHoo
Join Date
Aug 2007
Posts
3
28; differences are successive odd integers.

5. YahooHoo
Join Date
Sep 2007
Posts
1
28, 39, 52, 65, ...

t0 = 3
t1 = t0 + 1 = 4
t2 = t1 + 3 = 7
t3 = t2 + 5 = 12
t4 = t3 + 7 = 19
t5 = t4 + 9 = 28

tn = 3 + (2n -1)

hope that helps

6. YahooHoo
Join Date
Sep 2007
Posts
1
3+4 = 7
4+7+1 = 12
7+12 = 19
12+19+1 = 32

7. YahooHoo
Join Date
Sep 2007
Posts
1
28
You add 1, then 3, then 5....

8. Entry Level Fresher
Join Date
Jan 2008
Posts
28
i don't get it
It's too hard ;(

9. Fresher
Join Date
Jan 2013
Posts
51
Hello
ans is
1)3+0=3
2)3+1=4
3)4+3=7
4)7+5=12
5)12+7=19
6)19+9=28
7)28+11=39
this sequence of the line

10. Entry Level Fresher
Join Date
Oct 2014
Location
Posts
37
Answer of this question is 3+0=3
3+1=4
4+3=7
7+5=12
12+7=19
19+9=28
28+11=39