1.  Find the greatest number that will exactly divide 400 and 640. 
a.   40100 
b.   80 
c.   20 
d.   100





2.  Find the L.C.M. of 56,64? 
a.   448 
b.   559 
c.   630 
d.   349





3.  The H.C.F. of two numbers is 20 and L.C.M. is 23100. If one number is 700, find the other? 
a.   520 
b.   660 
c.   740 
d.   550




4.  The L.C.M. of two number is 420 and their ratio is 5:7. Find the sum of two numbers. 
a.   115 
b.   126 
c.   144 
d.   162




5.  The traffics lights at three different road crossings change after every 24 sec., 18sec., and 27sec., respectively. If all they change simaltineousaly at 4:10:00 hrs then they will change after simaltineousaly at 
a.   7:36:00hrs. 
b.   4:36:00hrs. 
c.   4:13:36hrs. 
d.   5:00:16hrs.





6.  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




7.  Find the least digit number which when divided by 36, 162, and 729 leaves the same remainder 5. 
a.   2916 
b.   2920 
c.   2522 
d.   2921




8.  Find the least number which on adding 7 is exactly divisible by each of 15, 35 and 48. 
a.   1663 
b.   1673 
c.   2093 
d.   1385




9.  If the product of two numbers is 84942 and H.C.F. is 33, find their L.C.M.? 
a.   2574 
b.   2250 
c.   3600 
d.   3450




10.  The L.C.M. of two numbers is 45 times to their H.C.F. If one of the numbers is 125 and sum of L.C.M. and H.C.F. is 1150, find the other number? 
a.   215 
b.   220 
c.   225 
d.   235




11.  Find the least number which is exactly divisible by 26, 45, 60 and 80. 
a.   1445 
b.   850 
c.   720 
d.   900





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




13.  if the product of H.C.F and L.C.M of two numbers is 1000 and one number is 20 then find the other 
a.   100 
b.   80 
c.   50 
d.   67



