Puzzle: Rectify the equation
Rectify the following equation: 101 - 102 = 1. You are allowed to move just one digit.
Answer: Show answer
Answer: Show answer
Move the numeral 2 half a line up to achieve: 101 - 102 = 1.
Showing posts with label math and number puzzles. Show all posts
Showing posts with label math and number puzzles. Show all posts
Saturday, 20 August 2016
Puzzle: The 5-digit number
What 5-digit number has the following property: If we put numeral 1 before this number, we get a number three times smaller than the number we get if we put numeral 1 after this number.
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Answer: Show answer
Using an easy equation, 3(x + 100000) = 10x + 1, we find out that the number is 42857.
Puzzle: Between 5 and 9
What mathematical symbol can be placed between 5 and 9, to get a number greater than 5 and smaller than 9?
Answer: Show answer
Answer: Show answer
Place a decimal point between them to get 5.9