exam Maths Puzzle Numerical Ability

Factor 6x^2 + 25x + 4. Please disregard first question as it was typed incorrectly.

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exam Other Question

How many pounds of hamburger that costs $1.10 per pound must be mixed with 50 pounds of hamburger that costs $1.80 per pound to make a mixture that costs $1.30 per pound? Can someone help me with this problem?

I need to find the first and third quartiles, Q1 and Q3, of the following set of numbers:

13,7,15,13,13,12,9,11,19,9

Thanks,
Sher