Question

Some trees are planted in rows of 10. Complete the formula to find the total number of
trees, t, in r rows

Answer 1

$\sf \LARGE \fbox \red{ Answer : }$

When equal number of trees are planted in rows of 6, 8, 10 or 12, five trees are left unplanted. Hence, number of trees will be (120x + 5), which must be divided by 13 as per the given condition in the question.

Answer 2

$\LARGE\mathcal {AN S W ER : }$

When equal number of trees are planted in rows of 6, 8, 10 or 12, five trees are left unplanted. Hence, number of trees will be (120x + 5), which must be divided by 13 as per the given condition in the question.