book Maths Puzzle Numerical Ability

Write the first four terms of the sequence an=64(1/4)^n, for n=0, 1, 2, 3,
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book Other Question

Ray started driving to the mall at 30 mph. A short while later he realized he forgot his wallet. He turned around & headed back to the house at 20 mph. It took him a total of .6 ho Find the quotient: 12x^8 y^8/-3x^5 y^3