exam Maths Puzzle Numerical Ability

Consider the function f(x) = 12.

What is f(0)?
f(16)?
f(-16.4)?

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exam Other Question

When young MacDonald was starting his farm a long time ago, cows cost $10 each, pigs cost $3 each, and chickens cost $0.50 each. He purchased at least one of each kind of animal. He paid axactly $100 for exactly 100 animals. How many chickens did he buy? Will someone please help me with this problem? (15x^-2y)^-2/5x^5y^3)