What will be the least number which when doubled will be exactly divisible by 12 , 18 , 21
and 30 ?
A) 196
B) 630
C) 1260
D) 2520
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What will be the least number which when doubled will be exactly divisible by 12 , 18 , 21
and 30 ?
A) 196
B) 630
C) 1260
D) 2520
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Answer:
630
Step-by-step explanation:
630
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Answer:
Option B
Explanation:
L.C.M. of 12, 18, 21 30 2 | 12 - 18 - 21 - 30
----------------------------
= 2 x 3 x 2 x 3 x 7 x 5 = 1260. 3 | 6 - 9 - 21 - 15
----------------------------
Required number = (1260 � 2) | 2 - 3 - 7 - 5
= 630.
Step-by-step explanation: