In each of the following numbers, replace $$ by the smallest number to make it divisible by $3$
$27 4$

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Solution

Using divisibility rule of $3$ :
To make given number divisible by $3,$ the sum of the digits should be divisible by $3$
Sum of digits of $27 * 4 = 2 + 7 + * + 4 = 13$
Number greater than $13$ which is divisible by $3$ is $15$
So, we have to add $2$ to $13$ to get $15$
Hence, we need to replace $*$ by $2$ .

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Replace $' □'$ in each of the following by the correct number:

$\frac{4}{□} = \frac{12}{15}$

Question 3(e) :

Replace $□$ in each of the following by the correct number:

$\frac{18}{24} = \frac{□}{4}$

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