Question

If 12 x 13=6 ,15 x 22 = 20 then 16 x 23 =__?

• A. 18
• B. 39
• C. 36
• D. 34

Answer 1

Answer:

C. 36

The answer is 36.

The logic is to multiply the individual digits of the first number by the individual digits of the second number.

$\text{(Product of digits of 1st number)} \times \text{(Product of digits of 2nd number)}$

• 12 × 13 = 6
  → $(1 \times 2) \times (1 \times 3) = 2 \times 3 = 6$

• 15 × 22 = 20
  → $(1 \times 5) \times (2 \times 2) = 5 \times 4 = 20$

• 16 × 23 = ?
  → $(1 \times 6) \times (2 \times 3) = 6 \times 6 = \mathbf{36}$