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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 numbers

the last number is the product of second and third number
ex.
4*3=12
4*5=20
6*7=42
7*8=56

the second last number is the last number plus the square of first number
ex.
12+2^2=16
20+3^2=29
42+5^2=67
56+6^2=92

hence following the same pattern
30+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 allso
4×3+4=16
5×4+5+4=29
6×5+6+5+4=45
7×6+7+6+5+7=67
8×7+8+7+6+8+7=92
 
 
6 years ago
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