# 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 1 of 5.
Vijaya said:
1 decade ago

Easy way is

7/8=0.875

13/16=0.8125

31/40=0.775

63/80=0.7875

by this we can easily say dat 7/8 is the largest fraction of them.

7/8=0.875

13/16=0.8125

31/40=0.775

63/80=0.7875

by this we can easily say dat 7/8 is the largest fraction of them.

Prashant pandey said:
1 decade ago

Yes vidya is right.

Nizamuddin said:
1 decade ago

No Prashant. Vidya is not correct to find the answer. Because you have to calculate all the possible values to retreive the answer. This is long process too rather than the problem explained in the beginning.

Keerthana said:
1 decade ago

What is explained in the problem is correct.

Hamsa said:
1 decade ago

How LCM value of 4, 16, 40 and 80 = 80 ?

Praveen said:
1 decade ago

Its right.

Jyoti mehta said:
1 decade ago

Why we multiply 7/8 to 10 ,13/16 to 5 and 31/40 to 2 ?

Power star pawan kalyan said:
1 decade ago

@Jyoti Mehta

We first find the lcm of the given numbers...7/8,13/16,31/40,63/80

then We'll get that value=80

So.. there goes the process and you'll get the above result...;)

We first find the lcm of the given numbers...7/8,13/16,31/40,63/80

then We'll get that value=80

So.. there goes the process and you'll get the above result...;)

Rohit said:
1 decade ago

The enswer explained is corect and a time saver too.

Ashok said:
1 decade ago

This logic is easy to find the answer & time saving too.

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