## King 3 years ago By what number less than 2 must be multiplied so that the last 3 figures on the right end of the product may be 791

1. King

igs hellp man....atleast try

2. King

@JamesJ ,@Tomas.A ,@Diyadiya help guys help!!!

3. King

help callisto!

4. King

this frm real numbers chapter

5. lgbasallote

oh man...im weak with these things @_@

6. King

@Callisto u are the only one with a chance of doin this...so do u know how to do it?

7. Callisto

Sorry i don't even understand the question :( what number less than 2 <-- does it mean a single number?

8. King

yeah there is some number...its related to HCF AND LCM THROUGH EUCLID'S DIVISION LEMMA

9. Callisto

Sorry haven't learnt that :(

10. Ishaan94

Word it right, you worded it so complex.

11. King

its a problem in my phase-4 fiitjee package..i gave it to u the way it is worded

12. King

but i dont understand answer is 871

13. King

oh sry wait its by what number less than 2must be multiplied with 43521.....

14. King

i by mistake frgt to mention 43521....:/

15. Ishaan94

Oh

16. King

so?

17. Ishaan94

Let x be the number, (435*100,000 + 521)*x = adasd...fsh791 So, last digit of x must be 1. The answer is clearly 871, but I did this problem with logic and it's really tough to explain logic unless your communication skills are really impressive. So... I am gonna tag @FoolForMath and @Mr.Math to see if they know some trick or the method you mentioned above.

18. Ishaan94

btw basic multiplication is what I used.

19. King

its 43521

20. King

not 43500521

21. Ishaan94

22. Ishaan94

23. King

its 43*1000 +521 or 435*100+21 rite?

24. King

435*1000 + 521)=435521

25. Ishaan94

26. King

oh and u can use any method......

27. Ishaan94

but it doesn't matter, just get the 521 separately and then multiply it my x (the assumed number).|dw:1332944499486:dw|

28. Ishaan94

by* not my ...and sorry for the bad handwriting.

29. FoolForMath

871 is the answer, if you know the one line multiplication then this problem is a 10 seconder ;)

30. King

@Ishaan94 what hav u done in the diagram can u post a normal reply the diagram is very messy so i cant understand anythin..................

31. Ishaan94

http://i0.kym-cdn.com/entries/icons/original/000/007/423/untitle.JPG I already told you, it's hard to explain. I don't wanna word it out.

@King , see my answer below. Hope u understand.

Please check the attached document. Hope u r clear now.

34. King