exam Maths Puzzle Numerical Ability

a farmer buys 100 animals for $100
chicks=10 cents each
pigs=$2 each
sheep=$5 each

how many of each does he buy

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exam Other Question

The simple interest "I" on a principal of "P" dollars at interest rate "r" for time "t", in years, is given by I = Prt. Find the simple interest on a principal of $6000 at 3% for 2 years. (Hint: 3%=0.03)

Thank you
2x/5-x/3=4