Question

You have been given a physical balance and 7 weights of 47, 46, 43, 48, 49, 42, and 77 kgs. Keeping weights on one pan and object on the other, what is the maximum you can weigh less than 178 kgs.

Answer 1

question is incomplete . A complete question is ------>3) You have been given a physical balance and 7 weights of 47, 46, 43, 48, 49, 42, and 77 kgs. Keeping weights on one pan and object on the other, what is the maximum you can weigh less than 178 kgs.

a. 172
b. 174
c. 175
d. 177

solution :- there is no any formula to solve it, just try to solve with 'Hit and Trial' method.

select 77 , 49 , 48 { these all are serially highest value in the given weighs so, we are selected it}
after adding we get, 77 + 49 + 48 = 174

hence, option (b) is correct.