Daily Dilemma #10: Answer Key

1. Work backwards:
   She used 1/4 of the total amount of soap to clean the clothes because she used half of the remaining half.
   So, the 15 bars of soap left is 3/4 of the total amount of soap.
   If n is the total number of bars of soap, 15 = 3/4 • n
   n = 20 bars of soap
2. 
3. 26 – 2 – 9 = 15 hours of praying from Monday through Friday.
   Then 15 ÷ 5 = 3 hours of praying each day.

There would be 14 candles so Peter would be 14 years old.

 

5. Doll = 1
   Soldier = 2
   Violin = 3

   From the first scale, a soldier is 2 if a doll is 1.
   Then a violin is the sum of a soldier and a doll, or 2 + 1 = 3
   On the third scale, the left side has a value of 5; the right side has a value of 7.
   So, the scale is balanced by putting 1 solider or 2 dolls on the left side.

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