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Grade: upto college level
```
2/3/4/16/12 3/4/5/29/20 4/5/6/XX/30 5/6/7/67/42 6/7/8/92/56 find x?

```
6 years ago

## Answers : (4)

Saurabh Singh
askIITians Faculty
49 Points
```							Interesting series!first three numbers in each term are pretty simple. they are consecutive numbersthe last number is the product of second and third numberex.4*3=124*5=206*7=427*8=56the second last number is the last number plus the square of first numberex.12+2^2=1620+3^2=2942+5^2=6756+6^2=92hence following the same pattern30+4^2=XX=46

Thanks & Regards
Saurabh Singh,
askIITians Faculty
B.Tech.
IIT Kanpur
```
6 years ago
san
10 Points
```							sir i did this ques by another way but it took me about 5 10 mins to think
this is wht i thought:
16+13=29;
29+17=46;
46+21=67;
67+25=92;
i never looked at your answer..
i jus wanted to know that an iitian would have solved this ques at one go? ..
if yes then should work even more hard to clear iit
```
6 years ago
san
10 Points
```							sir i did this ques by another way but it took me about 5 10 mins to think
this is wht i thought:
16+13=29;
29+17=46;
46+21=67;
67+25=92;
i never looked at your answer..
i jus wanted to know that an iitian would have solved this ques at one go? ..
if yes then should i work even more hard to clear iit
```
6 years ago
naina
8 Points
```							i think answer shuld be like this allso4×3+4=165×4+5+4=296×5+6+5+4=457×6+7+6+5+7=678×7+8+7+6+8+7=92
```
6 years ago
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