there is number X in decimal represntation whose last digit
is not 0. if digits of X are reversed then we obtain new
number say Y. both X and Y are divisible by 7. then find
all such X from 10 to 1000.

Answers were Sorted based on User's Feedback



there is number X in decimal represntation whose last digit is not 0. if digits of X are reversed ..

Answer / sanchit

consider any 3 digit number first...
100a+10b+c
reverse it-
100c+10b+a
if these two numbers are divisible by 7 even their
difference must be
so
99(a-c) is div by 7
-> a-c=7n
c can't be 0
so possible combinations-
8,1(you can also consider n=0 ->a=c)
and 9,2 ->numbers- 952,259,861,168(palindromes-707,77,868,777)

Is This Answer Correct ?    7 Yes 0 No

there is number X in decimal represntation whose last digit is not 0. if digits of X are reversed ..

Answer / whoami

48,84
I believe the above 2 answers are not appropriate because,
the question says "if digits of X are reversed then we
obtain NEW number say Y". i.e., The digits arent Palindrome.

Is This Answer Correct ?    1 Yes 1 No

there is number X in decimal represntation whose last digit is not 0. if digits of X are reversed ..

Answer / minto michael

palindromes won't work.
since when the digits of X are reversed,it should be a new
number Y. 77,707,343 and 777 ,all on reversing is giving
the same number.

Is This Answer Correct ?    1 Yes 1 No

there is number X in decimal represntation whose last digit is not 0. if digits of X are reversed ..

Answer / guest

343,707

Is This Answer Correct ?    1 Yes 2 No

there is number X in decimal represntation whose last digit is not 0. if digits of X are reversed ..

Answer / divya

77,777

Is This Answer Correct ?    1 Yes 4 No

Post New Answer

More General Aptitude Interview Questions

Four of the following five are alike in a certain way and so form a group. Which is the one that does not belong to that group? (a) Baking (b) Steaming (c) Cooking (d) Frying (e) Boiling

3 Answers  


In a sports contest there were m medals awarded on n successive days (n > 1). 1. On the first day 1 medal and 1/7 of the remaining m - 1 medals were awarded. 2. On the second day 2 medals and 1/7 of the now remaining medals was awarded; and so on. 3. On the nth and last day, the remaining n medals were awarded. How many days did the contest last, and how many medals were awarded altogether?

1 Answers   Infosys,


A right circular cylinder and a cone are there. Base radius of cone is equal to radius of cylinder. What is the ratio of height to slant side if their volume are the same?

3 Answers   L&T, Lucent,


plese,send to me the sbi clarical bank exam form.

1 Answers   State Bank Of India SBI, TCS,


1. Which is the greatest 3 u/root 7, 6 u/r 5, 2 u/r 20 is

1 Answers   SSC,






A person goes 4/5 of his usual speed reaches 10min late to his destination, time taken?

0 Answers   Infosys,


Petrol from a full tank was poured into 3 containers A, B and C. Container A stored 1/4 of the petrol. Container B stored 1/3 as much petrol as Container A. Container C stored 93.8 litres more than Container B. How much petrol was poured into the 3 containers altogether?

2 Answers  


Hello SIr, I want staff selection commission General Awareness books and intelligence books and materials with explan please send my ID sir and Railway Recruitment Group D books and materials please explan all subjects. Thanks you sir,

0 Answers   TCS,


If a clerk can process 80 cheques in half an hour, how many cheques can she process in a seven and one half hour day?

8 Answers   TCS,


in the avg ( arthematic mean) of 5,6,7 and w is 10 what is the value of w

3 Answers  


1/8 Is divided by 's' , if 's' is increased by 2 times, what Will be the result.

0 Answers   Wipro,


A pipe can fill a tank in 30 min B can fill in 28 min then if 3/4 th of tank can be filled by B pipe and after wards both are opened then how much time is required by both the pipes to fill the tank completely.

3 Answers   MBT, Solartis,


Categories