Tristen is building 3 trophies using Legos. He needs 324 total Legos. Tristen uses 220 Legos for the largest trophy and 135 Legos for the smallest trophy. How many Legos will he use to build the final trophy

Answer: 166

Step-by-step explanation:

Number of trophies = 3

Total Legos required for all trophies = 324

Number of Legos for largest trophy (A) = 220

Number of Legos for smallest trophy (B) = 135

Number of Legos required for final trophy (C)

=?

Total Legos = [Number of Legos for largest trophy (A) + Number of Legos for smallest trophy (B) + Number of Legos required for final trophy (C) ]

324 = 220 + 135 + C

324 = 355 + C

324 - 355 = C

-31 = C

135 + 31 = 166