exam Maths Puzzle Numerical Ability

insert one set of parentheses in the expression 2n-3+4n+6n+1 so that it is equivalent to 12n-5.

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exam Other Question

sally bought three chocolate bars and a pack of gum and $1.75. Jake bought two chocolate bars and four packs of gum and paid $2.00 find the cost of a chocolate bar and the cost of a pack of gum. Find a real number between each pair of numbers:

3 1/8 and 3 2/8