Button 1
Button 1
Button 1
Button 1
Button 1
Button 1
Button 1
Page Name
Page Name

Bite-Size Physics

Page Name
Page Name

The answer is C.

If you spell out each number, they are spelled with more letters than the last one. 10 has 3 letters, 4 has four letters, 7 has 5 letters, 12 has 6 letters and 15 has 7 letters.

 

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