Topics: Senior, String, Bit Manipulation, Weekly Contest 183 Given the binary representation of an integer as a string s, return the number of steps to reduce it to 1 under the following rules: It is guaranteed that you can always reach one…
MATHS WEEK is under way and, as is our annual tradition, we’re setting our readers some puzzles every night. Give them a go! You can check out other events being held over the next couple of days here. MORE THAN…
The solutions to today’s puzzles Earlier today I set you these six puzzles. Here they are again with solutions. 1. The oldest person must be lying, so the maximum is 2. Here is an example with 2 people telling the truth: 30-40-20 (Ages as…
MATHS WEEK is under way and, as is our annual tradition, we’re setting our readers some puzzles. Give them a go! You can check out other events being held over the next week here. Mathematical thinking is part of everyday…
Last night before bed, for no particular reason, I thought about Wolfgang Pauli and his obsession with the number 137 (see Wolfgang Pauli & the Weirdness of # 137). This morning I woke up wondering if the weirdness of the fine-structure constant (α≈1/137) must…
Play free Kiplinger puzzles and word games everyday, including crosswords, Sudoku and word search. Take a break and play today's free mini crossword. There's a new mini puzzle to test your wits every day. Try today's word flower puzzle. Find…
Alvaro A. - 395 words As the tallest land animals on Earth, giraffes are famous for reaching high up into the trees. Now, it turns out their minds can reach pretty far, too! Researchers from the University of Barcelona have found that these…
For the smart child, spotting the fifth letter of the alphabet was − "E-SEE" TO DO "It can be difficult to keep that strong sense of gratitude when you're exhausted, but the joy comes from making the art." − Eva Noblezada IT…
Quick Answer & Key Insight: Why Does 1/998001 Generate All 3-Digit Numbers? Yes, 1/998001 generates every 3-digit sequence. Because 998001 equals $999^2$, the decimal expansion cascades through consecutive integers, but carrying digits at the 998th block creates an unexpected loop trap that skips 998. See the mathematical…
Holes (Genus): 3 distinct holes passing through the figure 20 face pairs share a single edge. 8 face pairs share two edges. At every single vertex across the shape, exactly three faces meet. The most complex 3D shape that we come across in our…
Shapes, Tilings and Puzzles in Geometry: the news, the names and what changed.
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