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

Problems on H.C.F and L.C.M
The L.C.M of 22, 54, 108, 135 and 198 is

11880
5940
330
1980

ANSWER DOWNLOAD EXAMIANS APP

Problems on H.C.F and L.C.M
Which greatest possible length can be used to measure exactly 15 meter 75 cm, 11 meter 25 cm and 7 meter 65 cm

265 cm
255 cm
275 cm
285 cm

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Convert first all terms into cm.i.e. 1575 cm, 1125cm, 765cm.Now whenever we need to calculate this type of question, we need to find the HCF.HCF of above terms is 255.

Problems on H.C.F and L.C.M
Find the L.C.M.. of 72, 108 and 2100.

38000
37000
37800
38600

ANSWER DOWNLOAD EXAMIANS APP

Problems on H.C.F and L.C.M
252 can be expressed as a product of primes as:

3 x 3 x 3 x 3 x 7
2 x 2 x 2 x 3 x 7
2 x 3 x 3 x 3 x 7
2 x 2 x 3 x 3 x 7

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Clearly, 252 = 2 x 2 x 3 x 3 x 7.

Problems on H.C.F and L.C.M
Six bells commence tolling together and toll at the intervals of 2,4,6,8,10,12 seconds resp. In 60 minutes how many times they will toll together.

21
31
24
17

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

LCM of 2-4-6-8-10-12 is 120 seconds, that is 2 minutes.Now 60/2 = 30Adding one bell at the starting it will 30+1 = 31

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

540
360
180
1260

ANSWER DOWNLOAD EXAMIANS APP
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