book Maths Puzzle Numerical Ability

What is the sum of the first 30 positive odd whole numbers? is there some kind of relationship between the two?

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how many pounds of Brazilian coffee worth $5 per pound must be mixed with 20 pounds of colombian coffee worth $4 per pound, to produce a mixture worth $4.20 per pound? The ratio of spaniels to poodles at teh dog show was 5 to 7. If there were 35 spaniels at the dog show, how many poodles werw there?(Use a ratio box) P.S. thank you for the help.