MATHS Practice Set
LCM & HCF

                                            LCM & HCF – Set 01

1. The H.C.F. of two number is 8. Which one of the following can never be their L.C.M. ?
   a) 24
   b) 48
   c) 56
   d) 60
2. The LCM and HCF of two number 28 and 42 are in the ratio __________
   a) 6 : 1
   b) 2 : 3
   c)  3 : 2
   d) 7: 2
3. The LCM of two number is 1820 and their HCF is 26 . If one of the number is 130 then the other number  is _______
   a) 70
   b) 1690
   c) 364
   d) 1264
4. The LCM of two number is 1920 and their HCF is 16 . If the of the number is 128. Find the other number ?
   a) 204
   b) 240
   c) 260
   d) 320
5. The HCF of two number 112906 and 14818  is  478. Their LCM is __________
   a) 400086
   b) 200043
   c) 600129
   d) 800172
6. Find the greatest number of five digit which when divisible by 3 , 5 , 8 , 12 leaves 2 as  the remainder ?
   a) 99999
   b) 99948
   c) 999962
   d) 999722
7. The least multiple of 13 , which on dividing by 4 , 5 , 6 ,  7  and 8 leaves remainder in each case is _
   a) 2520
   b) 842
   c) 2522
   d)  840
8. Find the largest number of digits such that on dividing by  15 , 18 , 21  and 24 the remainders are 11 , 14 , 17 and 20 respectively ?
   a) 6557
   b) 7556
   c) 5675
   d)  7664
9. The two number are in ratio 3 : 4 . If their LCM is 240, the smaller of two number is :
   a)  100
   b) 80
   c) 60
   d)  50
10. The product of two  LCM and the HCF  of two number is 24 .If the difference of two number is 2, then the greater of the number .
    a) 3
    b) 4
    c) 6
    d)  8
    Answer
    01.d                            02.a                                  03.c                         04.b                              05.a
    06.c                            07.a                                 08.b                         09.c                               10. c