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.
Viswa said:
1 decade ago
Its wrong lcm of 8,16,40,80 = 160 not 80.
(1)
Sowmya said:
1 decade ago
I think answer given by @Hanumanth is right and easy. But is it applicable to all problems ?
Dhanya said:
1 decade ago
LCMof 8, 16, 40, 80 is 80 only. It is correct.
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).
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?
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.
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.
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.
Rakesh said:
1 decade ago
7/8=70/80, 13/16=65/80, 31/40=62/80 this answer how to come?
Asif said:
1 decade ago
I think @Vijaya is right, because it is easiest to check the correct answer that which fraction is larger or smaller.
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