For number 1-3, choose which among the strategies is the most appropriate and the best strategy that must be employed in solving the following problems:
1. A certain population of bacteria doubles every 10 minutes. If the number of bacteria in the population initially was 104, what was the number in the population 1 hour later?

A. Making a Table
B. Working Backwards
C. Guess and Check
D. Formulation of an Equation using a Variable

2. Gian went to the mall to shop. He went to a store, spent half of his money and then ₱500 more. He went to a second store, he spent half of his remaining money and then ₱500 more. He then had no money left. How much did he have to begin with when he went to the first store?

A. Finding a Pattern
B. Formulation of an Equation using a Variable
C. Solving a Similar but a Simpler Problem
D. Working Backwards

3. Little Susie has three dolls with names Ann, Mary, and Stacy. Each of her dolls has a different color dress (Pink, Yellow, White), and each doll has a special feature (Cry, Sing, Talk).
Using the clues below, determine which dolly has which color dress and what her feature is?
Clues:
          I. The dolly named Ann is not wearing a pink or white dress.
          II. Little Susie's white dress matches the doll who talks, which is not named Mary.
          III. The doll that sings is dressed in a pink outfit.

What dress color does doll Ann wear? What is its special feature?
A. Using a Diagram and Visual Representation
B. Guess and Check
C. Finding a Pattern
D. Logical Reasoning