Question
4 10 ? 62.5 156.25
390.625Solution
Numbers added with their Double and then subtract their Halves 4 + 4× 2 - 4/2 = 10 10 + 10 × 2 - 10/2 = 25 25 + 25 × 2 - 25/2 = 62.5 62.5 + 62.5 × 2 – 62.5/2 = 156.25 156.25 + 156.25 × 2 – 156.25/2 = 390.625
How many Zeros can be formed by multiplying 10×20×30×40×…………….× 3000
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