How many squares can you cou...
How many squares can you count in the given picture?Correct answers: 115
The first user who solved this task is Neelima Subrahmanyam.
#brainteasers #math #riddles
Paul VieilleDied 14 Jan 1934 at age 79 (born 2 Sep 1854).French scientist, known for his invention of smokeless powder. Military commanders since the Napoleonic Wars had problems giving orders on a battlefield swathed in thick smoke from the gunpowder used by the guns. In 1886 Paul Vieille invented a smokeless gunpowder called Poudre B. Made from gelatinized nitrocellulose mixed with ether and alcohol, it was passed through rollers to form thin sheets, which were cut with a guillotine to flakes of the desired size. It revolutionized the effectiveness of small guns and rifles.It was much more powerful than gun powder, giving an accurate rifle range of up to 1000 yards. |