State whether the following are true (T) or false (F) and justify the answers.
The lowest number which is divisible by $7, 5$ and $4$ is $180 .$

True

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False

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Solution

The correct option is B False
The given statement is false because the lowest number divisible by $7, 5$ and $4$ will be LCM of the given numbers.
LCM of $7, 5$ and $4$ $=$ $7 \times 5 \times 4 = 140$ ( All numbers are co-prime )

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