exam Maths Puzzle Numerical Ability

Ed and Dave are going to divide a case prize of $14,000 in a ratio of 2 to 5. How much will Dave receive?

I came up with 8,000. I am not sure this is correct. Could you verify this for me? Thanks.

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exam Other Question

Anna has 12 bills in her wallet, some $5 and some $10. The total value of the bills is $100. How many of each bill does Anna have? The edges of three cubes are consecutive odd integers. If the cubes are stacked as shown the total exposed surface area is 381 cm2. Find the lengths of the sides of the cubes.

i need an equation for this pls..