exam Maths Puzzle Numerical Ability

add the odd numbers from 5 through 371. this is an arithmetic series..

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exam Other Question

1. Calculate
a)the mass of salt in 100 kg of 30% salt solution , by mass

b)the volume of alcohol in 1500L of a 40% alcohol solution, by volume

c) the volume of antifreeze Phosphorous-32 is used to mark cells in biological experiments. If phosphorous-32 has a continuous daily decay rate of 4.85%, what is the half-life?