June 15
If a+b+c = 7 and ab+bc+ac = 12, then what is the value of a² + b² + c²?
a) 25
b) 49
c) 36
d) 19
Answer: On June 16
June 14
What is the radius of a circle x² + y² + 4x + 8y -16 = 0 whose diameters are x + y = -6 and x - y = 2, respectively?
a) 2 units
b) 6 units
c) 7 units
d) 10 units
Answer: b) 6 units

June 13
Which of the following is the purest quality of coal?
a) Peat
b) Lignin
c) Bituminous
d) Anthracite
Answer: On June 14

June 12
Which is the first triploblastic animals group?
a) Cnidaria
b) Platyhelminthes
c) Annelida
d) Chordata
Answer: b) Platyhelminthes

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