exam Maths Puzzle Numerical Ability

87.Money is invested in a savings account at 12% simple interest.After one year there is $1,680 in the account.How much was originally invested?

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exam Other Question

Divide
(x6-8x^3+12)/(x^3-2)=
simplify (3x^3yz^-1)/(-12xy^-2z^2)