book Maths Puzzle Numerical Ability

Find the lateral surface area of a right circular cylinder with radius 7 cm and height 24 cm

Find the volume of a square pyramid 13 m tall whose base measures 5 m on a side

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book Other Question

I'm not sure how to handle the radical in this quadriatic equation:

x^2 + x + sqrt(x^2 + x) - 2 = 0

In the provide examples, the duplicated x^2 + x can be substituted by some A jar of contains 3 red, 5 white, and 2 blue marbles.A marble is drawn.What is the probability that the marble is blue? the answer is....1/4, 1/45, 1/3, or none of these? thank you for the help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!