exam
Maths Puzzle
Numerical Ability
Suppose n-15 is a whole number. What do you know about the value of n? Explain
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x+5y=10
-2x-10y=-20
2x+10y=20
-2x-10y=-20
0 = 0
Just double check to make sure this is right?
Mary took 5 English tests. Her scores were 78%, 89%, 98%, 67%, and 90%.
What must she score on her sixth test so her average will be 85%?