book Maths Puzzle Numerical Ability

How many different seven digit numbers can be made by rearranging the digits 3053354?

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book Other Question

solve for the indicated variable. area of a trapezoid

solve for b1:A=1/2h(b1+b2) b1 is top line of trapezoid
b2 is bottom line of trapezoid Last year Mary had a 6.5% increase in her monthly income. This year she has a cuz of 2% in her monthly income. Now Mary's monthly income is $1610.22. How much was Mary's monthly in