Aptitude - Problems on H.C.F and L.C.M - Discussion
Discussion Forum : Problems on H.C.F and L.C.M - General Questions (Q.No. 24)
24.
Which of the following fraction is the largest ?
Answer: Option
Explanation:
L.C.M. of 8, 16, 40 and 80 = 80.
| 7 | = | 70 | ; | 13 | = | 65 | ; | 31 | = | 62 |
| 8 | 80 | 16 | 80 | 40 | 80 |
| Since, | 70 | > | 65 | > | 63 | > | 62 | , so | 7 | > | 13 | > | 63 | > | 31 |
| 80 | 80 | 80 | 80 | 8 | 16 | 80 | 40 |
| So, | 7 | is the largest. |
| 8 |
Discussion:
49 comments Page 3 of 5.
Rakesh said:
1 decade ago
7/8=70/80, 13/16=65/80, 31/40=62/80 this answer how to come?
Md. Khurshid said:
1 decade ago
I think @Hanumanth is right, because it is easiest way to check the correct answer that which fraction is larger or smaller.
Deepti said:
1 decade ago
The answer given by @Hanumanth is not applicable to all kinds of questions with same nature. I have tried. Its wrong.
Amita said:
1 decade ago
(a) 7/8 (b) 13/16 (c) 31/40 (d) 63/80.
First of all I compare b/t a and b with cross multiplication.
7/8, 13/16.
7*16 13*8.
112 >104.
So 7/8>13/16.
Again compare b/t 7/8 and 31/40.
7*40 31*8.
280 > 248, so 7/8>31/40.
Again compare b/t 7/8 and 63/80.
7*80 8*63.
560 > 504, so 7/8>63/80.
So 7/8 is largest.
First of all I compare b/t a and b with cross multiplication.
7/8, 13/16.
7*16 13*8.
112 >104.
So 7/8>13/16.
Again compare b/t 7/8 and 31/40.
7*40 31*8.
280 > 248, so 7/8>31/40.
Again compare b/t 7/8 and 63/80.
7*80 8*63.
560 > 504, so 7/8>63/80.
So 7/8 is largest.
Glory said:
1 decade ago
Hi guys,
Which one is correct in simple way am confused with your solutions, I need to understand how to use L.C.M in solving that question?
Which one is correct in simple way am confused with your solutions, I need to understand how to use L.C.M in solving that question?
Manju said:
1 decade ago
Hai guys!
The following fractions are 7/8, 13/16, 31/40, 63/80.
If we take 7/8. First we have to sub these (8-7 =1 ) and divide numerator with 1 (7/1 = 7) same process.
13/16, 16-13 = 3 13/3 = 4.3.
31/40, 40-31 = 9 31/9 = 3.4.
63/80, 80-63 = 17 60/17 = 3.94.
By this we can easily say that 7, 4.3, 3.94, 3.4.
(this process we can applicable for descending and ascending order).
The following fractions are 7/8, 13/16, 31/40, 63/80.
If we take 7/8. First we have to sub these (8-7 =1 ) and divide numerator with 1 (7/1 = 7) same process.
13/16, 16-13 = 3 13/3 = 4.3.
31/40, 40-31 = 9 31/9 = 3.4.
63/80, 80-63 = 17 60/17 = 3.94.
By this we can easily say that 7, 4.3, 3.94, 3.4.
(this process we can applicable for descending and ascending order).
Dhanya said:
1 decade ago
LCMof 8, 16, 40, 80 is 80 only. It is correct.
Sowmya said:
1 decade ago
I think answer given by @Hanumanth is right and easy. But is it applicable to all problems ?
Viswa said:
1 decade ago
Its wrong lcm of 8,16,40,80 = 160 not 80.
(1)
Shyam said:
1 decade ago
Dear @Naveenkk can you please explain with details as @Hanumanth.
And is this method applicable to all this type of problems. Like those don't have common divisor.
And is this method applicable to all this type of problems. Like those don't have common divisor.
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