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Maths Puzzle
Numerical Ability
A fruit crate has square ends and is twice as long as it is wide. Find the volume if its width is 20 inches.
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If a number is subtracted from its the result is 2. find the number.
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problem 1; let T belongs to L(V) such that T not equal to I,T not equal to 0,T not equal to -I but T^2=T.please help me in finding the minimal polynomial of T.