Question

Which among the following gives the same value as $5\times 4$ ?

• A. $3\times 5$
• B. $10\times 2$
• C. $4\times 5$
• D. Both (b) and (c)

Answer 1

The correct option is D Both (b) and (c)

To find out the value of $5\times 4$ using the multiplication table, we draw the lines down $5$ and across $4$, which intersect at $20$. Hence, $5\times 4=20$.


To find out the value of $4\times 5$ using the multiplication table, we draw the lines down $4$ and across $5$, which also intersect at $20$. Hence, $5\times 4=4\times 5=20$.

$\underset{–}{\text{Note:}}$ From $5\times 4=4\times 5=20$, it is clear that order does not matter in multiplication.

To find out the value of one of the options $3\times 5$ using the multiplication table, we draw the lines down $3$ and across $5$, which intersect at $15$. Hence, $3\times 5=15$, which is not equal to $5\times 4=20$.

Lastly, to find out $10\times 2$ using the multiplication table, we draw the lines down $10$ and across $2$, which intersect at $20$. Hence, $10\times 2=20$, which is equal to $5\times 4=20$.

$\therefore$ $5\times 4=4\times 5=10\times 2=20$

Hence, option (d.) is the correct one, i.e., both (b.) and (c.) are correct.