exam Maths Puzzle Numerical Ability

Given A = (1,2,3) and B = (2,1,3) then which is true:
A. 1 ⊆ A
B. A ⊂ A
C. A ⊂ B
D. A ⊆ B

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exam Other Question
Can you assist me in solving this problem? I am a bit confused on how to set up the problem to get the answer. Find teh sum or difference. -1 5/8 - ( -2 1/5 )








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