Ques:- 21 mango trees, 42 apple trees and 56 orange trees have to be planted in rows such that each row contains the same number of tress of one variety only. Minimum number of rows in which the trees may be planted is
A. 2
B. 5
C. 12
D. 17
Difference number of trees between mango and apple is 21
Difference number of trees between apple and orange is 14
Minimum number of rows = (21+14)/2=35/2=17.5~ 17
Number of trees in each row = HCF of 21, 42, 56 = 7
Hence number of rows
= (21+42+567)=1197=17
7*3=21
7*6=42
7*8=56
3+6+8=17……
21+42+56=119
Each on calculate on seven table and you will get ans
119/7=17
d