QUANTITATIVE APTITUDE - H.C.F AND L.C.M SET 05

H.C.F AND L.C.M SET 05

1. HCF of 4/3, 8/6, 36/63 and 20/42
 

A)4/126        B)4/8        C)4/36        D)4/42        E)None of these
 

2. Find the LCM of 3/8, 9/32, 33/48, 18/72
 

A) 3/8        B)8/33        C)198/8        D)8/3        E)None of these
 

3. The HCF of 2511 and 3402 is
 

A) 31        B)42        C)76        D)81        E)None of these
 

4. A gardener had a number of shrubs to plant in rows. At first he tried to plant 8,then 12 and then 16 in a row but he had always 3 shrubs left with him. On trying 7 he had none left. Find the total number of shrubs.
 

A)154        B)147        C)137        D)150        E)None of these
 

5. If m and n are two whole numbers and if mn= 49. Find n^m, given that n ≠ 1
 

A)118        B)94        C)561        D)128        E)None of these
 

6. What will be the least number which when doubled will be exactly divisible by 12,18,21 and 30?
 

A)630        B)360        C)603        D)306        E)None of these
 

7. HCF and LCM of two numbers are 11 and 385 .If one number lies between 75 and 125 then that number is
 

A)123        B)73        C)77        D)154        E)None of these
 

8. If the L.C.M of x and y is z, their H.C.F is
 

A)xy/z        B)xyz        C)(x + y)/z        D)z/xy        E)None of these
 

9. A rectangular courtyard 140cm long 525cm wide is to be paved exactly with square  tiles, all of the same size. what is the largest size of the tile which could be used for the purpose?
 

A)64cm        B)35cm        C)21cm        D)28cm    E)None of these
 

10. Two containers contain 50 and 125 litres of water respectively. Find the maximum capacity of a container which can measure the water in each container an exact number of times(in litres)
 

A)25        B)11        C)12        D)15        E)None of these

Answer Keys:
1. A
2. C
3. D
4. B
5. D
6. A
7. C
8. A
9. B
10. A