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      Home > Quizzes and Fun Tests > GRE Practice Tests > GRE Practice Test - Math - L.C.M. and H.C.F

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The GRE Practice Test - Math - L.C.M and H.C.F has been designed to test the important concepts related to l.c.m and h.c.f. The test covers important topics like finding l.c.m or h.c.f of numbers, finding prime numbers, computing the smallest and greatest numbers that are divisible by some numbers and so forth.
1. Find the greatest number that will exactly divide 400 and 640.
a.40100
b.80
c.20
d.100
Last improved on 10/10/2012 at 6:39:51 AM by CMKENZEI
2. Find the L.C.M. of 56,64?
a.448
b.559
c.630
d.349
Last improved on 8/11/2012 at 4:46:35 AM by shaima
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.
Last improved on 11/4/2012 at 11:17:18 AM by gaurav
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
Last improved on 11/3/2012 at 2:09:24 AM by simmone
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
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What others think about GRE Practice Test - Math - L.C.M. and H.C.F
By: Abhilash on Jan 23, 2009
  This is a good website to learn maths very well to entrance tests.
  

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