The LCM of two positive nos is 168 and their product is 504.
what is the difference in their squares?
A. 175 B.216 C.9 D.135




Answers were Sorted based on User's Feedback



Answer / aashima

Hi All,
The ans of this question 135.
504=2*2*2*3*3*7=8*3*3*7=24*21
168=2*2*2*3*7

it means 3 will come in both the numbers as 3 is coming
once in LCM but coming as 9 in product.

so possible numbers are 24 and 21.
so diff of products is 24*24-21*21=135

Is This Answer Correct ?    60 Yes 3 No

Answer / prasun bose

let the numbers be a and b
so by question---ab=504 the product
and LCM= ab/common factor=168
so common factor=ab/168 =504/168 =3
factors of LCM 168=2,2,2,3,7
so taking 3 on both side,we have
2,2,2and3 is one nunber and the other is
3,and 7 . so the numbers are 24 and 21
now the difference of the square of these nunbers
is a2-b2=(a+b)(a-b)=(24+21)(24-21)=45(3)=135
thus the answer is D

Is This Answer Correct ?    25 Yes 1 No

Answer / jagdish

D-135

Is This Answer Correct ?    17 Yes 5 No




Answer / sumit sourabh

d-135

Is This Answer Correct ?    9 Yes 2 No

Answer / raguldeeban

135

Is This Answer Correct ?    1 Yes 0 No

Answer / venukumar bn

135

Is This Answer Correct ?    1 Yes 0 No

Answer / siva

Answer 4 is absolutely correct

Is This Answer Correct ?    1 Yes 1 No

Answer / harsha

LCM * HCF=product of 2 numbers(a*b)
168*HCF=504
HCF will be 3.
therefore 504 is product of 2 numbers which are multiples of 3..
find out those 2 numbers which are multiples of 3 and their product is 504.
504=2*2*2*3*3*7.=(8*3)*(3*7)
504=24*21...i.e., a=24 ,b =21
difference between products=(24*24)-(21*21)=576-441=135.

Is This Answer Correct ?    0 Yes 0 No

Answer / n.mohamed gibereel

216

Is This Answer Correct ?    1 Yes 3 No

Answer / guest

216

Is This Answer Correct ?    1 Yes 5 No

Post New Answer





More General Aptitude Interview Questions

pls send me the aptitude question/previous years question papers of sbi to my email akhilagopakumar@yahoo.com

0 Answers   State Bank Of India SBI,


2. The school committee of a small town wanted to determine the average children per household of the town. They divided the total no. of children in the town by total no. of households. Total no. of households = 50. Which of the following statements must be true if the average children per household are 2.2?

2 Answers   TCS, Mu Sigma,


in an cricket match the team has to score 8 runs from 3 balls,the crickets on the grease were at a:92;b:96,they must complete hundred in the match how?

17 Answers   Infosys,


The average length of three tapes is 6800 feet. None of the tapes is less than 6400 feet. What is the greatest possible length of one of the other tapes?

2 Answers   TCS,


how much accuracy is required to get selected in ssc ldc

1 Answers  






A machine puts c caps on bottles in m minutes. How many hours will it take to put caps on b bottles?

3 Answers  


i will come thrice in a minute, twice in a hour, once in a day, who am i?

2 Answers   Infosys,


A chocolate block is of 4 X 4 size.How many cuts are needed to make 1 X 1 size blocks. No simultaneous vert. & horz. cuts?

5 Answers   Hughes,


sir iam asking you assistant stastical officer previous question paper

0 Answers  


A/B = 3/5 15A = ?

6 Answers   CMC,


There are 1997 doors in a auditorium and as many as people as the no of doors open enter the auditorium .A door was closed and as many as people as no of doors open leave the auditorium . the process was repeated till the no of doors is equal to1.find the total no of peoples enter the auditorium?

3 Answers   CTS,


can anyone please tell me the written test pattern for FIDELITY (for incampus)for freshers......

0 Answers   TCS, CAT,






Categories