That was a trickier one. He turned the problem over and over in his head, trying to figure out how it could be possible. Four threes weren't sixteen, they were twelve. Whatever pattern led to this answer would tell him what to do with the fives, so...
There were ways to make sixteen, all right. Four times four, eight times two, sixteen times one, ten plus six, eight plus eight...but nothing with four threes.
He conjured up a mental image of threes, wiggling his fingers in the approximation. Wait. That sort of looked like eights if two of them were mirrored and the four were squished together...but then how could the fives be twisted? All that made was symbols that looked like little cherries if they were mirrored the same way as the threes. Some other way, or a new path entirely?
He tried to show this idea to the Doctor, but it was difficult without a pen and paper. It ended up as a series of finger squiggles.
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That was a trickier one. He turned the problem over and over in his head, trying to figure out how it could be possible. Four threes weren't sixteen, they were twelve. Whatever pattern led to this answer would tell him what to do with the fives, so...
There were ways to make sixteen, all right. Four times four, eight times two, sixteen times one, ten plus six, eight plus eight...but nothing with four threes.
He conjured up a mental image of threes, wiggling his fingers in the approximation. Wait. That sort of looked like eights if two of them were mirrored and the four were squished together...but then how could the fives be twisted? All that made was symbols that looked like little cherries if they were mirrored the same way as the threes. Some other way, or a new path entirely?
He tried to show this idea to the Doctor, but it was difficult without a pen and paper. It ended up as a series of finger squiggles.