book Maths Puzzle Numerical Ability

On a string of pearls, the middle pearl is the largest and most expensive of all. Starting from one end, each pearl is worth $100.00 more that the one before it up until the middle

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two candidates attempt to solve a quadratic equation of the form x2+px+q=0.one starts withmany value of p and his roots are -4 and 3. The other starts with a wrong value of q and h Please help me solve this fraction: 8(-3)/[(2+3)^3(2)]

I know you are supposed to do the exponent first but I can not remember if you add 2+3 then raise it to 3 or raise each f