I am trying to resolve it by applying the divisibility rule method. We can assume the total number of rose plants as N So, as mentioned
Ariel plants them in rows of 5 and has leftovers for the last column = N = 5q + 4( q is some integer)-->1
Betty plants them in rows of 7 and has 1 left over = N = 7p + 1 ( p is some integer)-->2
By equating equations 1 & 2, we get 5q + 4 = 7p + 1(Here we can interpret that if N-4 is divisible by 5 and N-1 is divisible by 7). It is also mentioned that (total no. of roses) i.e. N < 60. So, the nos that are divisible by 5 and give the remainder 4 are 4,9,14,19, 24,24,29,34,39 so on. Same way nos. that are divisible by 7 and give the remainder 1 are 1,8,15,22,29,36,43 so on.
We can see the common no. as 29. So, the value for N is 29.
1. Charlie plants them in rows of 6 to get x left over for the last column = 29/6 = 5 (remainder) So, x = 5
2. Deb wants to plant them in such a way that there are more than four rows and at least five filled columns, and he is left with y plants for the last column. Need more than 4 rows and at least 5 columns. So, here are the factors of 29 that are prime. The only way to fit this is 5*5 = 25 which leaves 4 as the remainder(plant for the last column). So, Y = 4
Bismuth83
An equal number of Rose plants but less than 60 are given to each of the four students during a plantation drive. The students have to plant them in columns and rows.
Ariel plants them in rows of 5 and has 4 left overs for the last column, while Betty plants them in rows of 7 and has 1 left over.
Also, Charlie plants them in rows of 6 to get x left over for the last column. Deb wants to plant them in such a way that there are more than four rows and at least five fully filled columns, and he is left with y plants for the last column.
Select for x the number of plants that Charlie plants in the last column and select for y the number of plants that Deb plants in the last column.