Finally, the real stunner is that these are designed to look like picture frames, and not just any old frames, but gallery-quality fine art frames. Through an exclusive art store, you can even ...

With over ten years of experience in the photo industry, she started shooting with the Canon EOS 5D Mark III and Nikon D800 DSLRs and always comes back to a full-frame DSLR for comfort and quality.

The difference is 3. The 3rd multiple of seven is 7 × 3 = 21. The 4th multiple of six is 6 × 4 = 24. The difference is 24 – 21 = 3. The first factor pair is 1 and the number itself (12).