Solve this series -

@thebigk • Oct 25, 2024

Oct 25, 2024

1.1K

Got this through email -

2[FONT=&quot]

3[FONT=&quot]
[/FONT]
4[FONT=&quot]
[/FONT]
15[FONT=&quot]
[/FONT]
12[FONT=&quot]
[/FONT]
3[FONT=&quot]
[/FONT]
4[FONT=&quot]
[/FONT]
5[FONT=&quot]
[/FONT]
28[FONT=&quot]
[/FONT]
20[FONT=&quot]
[/FONT]
4[FONT=&quot]
[/FONT]
5[FONT=&quot]
[/FONT]
6[FONT=&quot]
[/FONT]
45[FONT=&quot]
[/FONT]
30[FONT=&quot]
[/FONT]
5[FONT=&quot]
[/FONT]
6[FONT=&quot]
[/FONT]
7[FONT=&quot]
[/FONT]
66[FONT=&quot]
[/FONT]
42[FONT=&quot]
[/FONT]
6[FONT=&quot]
[/FONT]
7[FONT=&quot]
[/FONT]
8[FONT=&quot]
[/FONT]
???[FONT=&quot]
[/FONT]
56[FONT=&quot][/FONT]
[/FONT]

Like 0 Replies 6

Replies

Welcome, guest

Join CrazyEngineers to reply, ask questions, and participate in conversations.

CrazyEngineers powered by Jatra Community Platform

Mahesh Dahale

@mahesh-E2tZ3t • Nov 18, 2009

answer is 88
0
yadavundertaker mohit

@yadavundertaker-0p3HBs • Nov 18, 2009

91

is it correct...
0
yadavundertaker mohit

@yadavundertaker-0p3HBs • Nov 18, 2009

logic

15/3=5

28/4=7

45/5=9

66/6=11

x/7=13

hence on solving x=91
0
itchap

@itchap-RKJQDB • Nov 18, 2009

Answer will be 91...as far as i got its logic should be..

add first two digits means 2+3=5. Now multiply the second digit with this sum means 3*5=15. Providing the fourth no.of series. Than multiply the third and fourth no. i.e 3*4=12
Which will give you the fifth no....and so on for other numbers.

Correct me if i am wrong.
0
cooltwins

@cooltwins-I5yJpZ • Nov 18, 2009

yadavundertaker
91

is it correct...
yadav's answer goes with mine and his logic is also close but any way to make it more clear here is the logic i used:

the series should first be rewritten as:
2....3....4....5....6
3....4....5....6....7
4....5....6....7....8
15..28..45..66..??
12..20..30..42..56

i.e.,split the series and put it as 5 columns

now to get to the analysis....
the first three terms are easy placing as you can see now

for the fourth term :

in the first column multiply the 2nd element with 5

now progress to the next column and multiply its 2nd element with the next odd no=7 to get that columns 4th elem.

now for the third col. 2nd*9=4th

for fourth col. 2nd*11=4th

and now for the 5th col 2nd*13=??

=> 7*13=91=??

so the answer is 91.

correct me if i am wrong.
0
yadavundertaker mohit

@yadavundertaker-0p3HBs • Nov 19, 2009

so many logics ....i was able to come up with only one ...
0