### Today’s Puzzle:

If you know the factors of the clues in this Christmas tree, and you use logic, it is possible to write each number from 1 to 12 in both the first column and the top row to make a multiplication table. It’s a level six puzzle, so it won’t be easy, even for adults, but can YOU do it?

### Factors of 1704:

If you were expecting to see a factor tree for the number 1704, here is one of several possibilities:

- 1704 is a composite number.
- Prime factorization: 1704 = 2 × 2 × 2 × 3 × 71, which can be written 1704 = 2³ × 3 × 71.
- 1704 has at least one exponent greater than 1 in its prime factorization so √1704 can be simplified. Taking the factor pair from the factor pair table below with the largest square number factor, we get √1704 = (√4)(√426) = 2√426.
- The exponents in the prime factorization are 3,1 and 1. Adding one to each exponent and multiplying we get (3 + 1)(1 + 1) (1 + 1) = 4 × 2 × 2 = 16. Therefore 1704 has exactly 16 factors.
- The factors of 1704 are outlined with their factor pair partners in the graphic below.

### More About the Number 1704:

1704 is the difference of two squares in FOUR different ways:

427² – 425² = 1704,

215² – 211² = 1704,

145² – 139² = 1704, and

77² – 65² = 1704.

Why was Six afraid of Seven? Because Seven ate Nine.

1704 is 789 in a different base:

1704₁₀ = 789₁₅ because 7(15²) + 8(15¹) + 9(15º) = 1704.