Q: A 21 cm long wire is to be cut into two pieces so that one piece will be 2/5th of the other, how many centimeters will the shorter piece be?
Options:
(A) 12
(B) 6
(C) 88
(D) 77
(E) 14 Let's give some random thoughts before answering.
1: 2/5 = 5: 2
2/7 * 21 = 6
Therefore, the answer is (B).