1.  Find the L.C.M. of 36, 48, 72 and 108. 
a.   432 
b.   342 
c.   144 
d.   288




2.  Find the greatest number which on dividing 277, 757 and 3307 leaves the same remainder 7 in each case. 
a.   30 
b.   15 
c.   60 
d.   25




3.  The L.C.M. of two number is 252 and their ratio is 6:7. Find the numbers. 
a.   32, 49 
b.   16, 25 
c.   36, 42 
d.   54, 63




4.  Find the greatest number that will divide 63, 45 and 69 so as to leave the same remainder. 
a.   6 
b.   9 
c.   8 
d.   10




5.  A room is 2.47m long and 2.09m broad. It is required to pave the floor with minimum square slabs. Find the number of slabs required for floor. 
a.   143 
b.   361 
c.   142 
d.   165




6.  Find the least perfect square number whcih is divisible by 2,3,4,5,6. 
a.   3600 
b.   900 
c.   2500 
d.   1600




7.  Find the least five digit number which on divided by 12, 18, 21, and 28 leaves the same remainder. 
a.   11019 
b.   12089 
c.   10119 
d.   10059




8.  Which smallest number must be added to 605329 so that it becomes divisible by 9? 
a.   3 
b.   5 
c.   2 
d.   7




9.  Find the greatest number of four digits which is exactly divisible by each of 12, 18, 40 and 45. 
a.   9550 
b.   9720 
c.   8500 
d.   8650




10.  Find the L.C.M. of 6/7, 12/13, 7/15. 
a.   84 
b.   1/84 
c.   13 
d.   1/13




11.  Find the least number which is exactly divisible by18, 15, 25 and 30. 
a.   450 
b.   900 
c.   550 
d.   750




12.  The sum and the differences of the L.C.M. and the H.C.F. of two numbers are 312 and 264, respectively. Find the numbers if their sum is 168. 
a.   108, 84 
b.   92, 84 
c.   72, 84 
d.   96, 72




13.  find the least number when divided by 6,15 and 18 leaves a remainder 5 in each case 
a.   512 
b.   411 
c.   11123 
d.   112




14.  The L.C.M. of two numbers is 60. The numbers are in the ratio 4:5. Then HCF of the number is: 
a.   2 
b.   3 
c.   4 
d.   5




15.  The total answer we get after doing the L.C.M. is 1980 what is the number. 
a.   36,55 
b.   69,11 
c.   88,12 
d.   69,15



