Problems on H.C.F and L.C.M

Problems on H.C.F and L.C.M
Find the HCF of of 0.36, 0.48, 0.72 and 2.4

0.8

0.12

0.16

0.4

0.8

0.12

0.16

0.4

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Problems on H.C.F and L.C.M
The traffic lights at three different road crossings change after every 48 sec., 72 sec and 108 sec.respectively .If they all change simultaneously at 8:20:00 hours,then at what time they again change

8:27:12 hrs

9:22:08 hrs

7:25:14 hrs

10:13:17 hrs

8:27:12 hrs

9:22:08 hrs

7:25:14 hrs

10:13:17 hrs

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Problems on H.C.F and L.C.M
The least square number which divides 8, 12 and 18 is?

144

100

64

121

144

100

64

121

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Problems on H.C.F and L.C.M
H.C.F of 4 * 27 * 3125, 8 * 9 * 25 * 7 and 16 * 81 * 5 * 11 * 49 is:

1260

540

360

180

1260

540

360

180

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Problems on H.C.F and L.C.M
The least number which should be added to 2497 so that the sum is exactly divisible by 5, 6, 4 and 3 is:

21

23

24

22

21

23

24

22

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Problems on H.C.F and L.C.M
Five bells ring together and ring at intervals of 2, 6, 8, 12 and 15 seconds respectively. How many times will they ring together in 60 minutes?

33

32

31

34

33

32

31

34

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