exam
Maths Puzzle
Numerical Ability
how much pure gold should be melted with 15 grams of 14-karat gold to produce 18-karat gold?
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exam Other Question
1)What is the inverse element of 7 under the binary operation "x" defined on the set of real numbers.
2) The binary operation * is defined on the set {0,1,2,3} as a*b=a^2-b^2+ab.
write a rule for:
domain: 1,3,5,7,9
range: 0,1,2,3,4