Can you solve it? The club sandwich problem

Can you solve it? The club sandwich problem
 

Here are two puzzles I ordered on room service.
1) A number sandwich is a line of digits such that there is one digit sandwiched between the 1s, two digits sandwiched between the 2’s, three digits sandwiched between the 3’s, and so on. For example, 312132 is a number sandwich with the digits 1,2 and 3
Construct a number sandwich with the digits 1,2,3 and 4. (Each digit will appear exactly twice.)
2) A number club sandwich is a number sandwich in which each digit appears exactly three times. The same rules as above apply: one digit is sandwiched between any two consecutive 1s, two digits are... read more

 
16 December 2019 in Learning, Views: 62
Source: Guardian
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