exam Maths Puzzle Numerical Ability

2w-x+5y+z=-3
3w+2x+2y-6z=-32
w+3x+3y-z=-47
5w-2x-3y+3z=49

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exam Other Question

How many real zeroes are there in f(x) = (x + 3)(x � 4)(x + 6)(x^2 + 7)?
@ This is fairly straightforward. Only the last factor results in imaginary solutions
a. 3
b. 5
c. 4
d. None of the above A bank has an unlimited suppy of 3-peso ans 5-peso notes. show that with these two types of notes the bank can pay any number of pesos greater than 7.

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