According to the Guinness World Records, the largest swimming pool in the world is San Alfonso del Mar Seawater pool in Algarrobo, Chile. It is 1,013 m (3,323 ft) long and has an area of 8 ha (20 acres). At its deepest, it is 35 m (115 ft) deep. It was completed in December 2006.
In April 2003 climber Aron Ralston entered Utah's Bluejohn Canyon only to become trapped when an 800-pound (360-kilogram) boulder shifted, crushed his hand, and pinned him to the canyon wall. For six days, Ralston struggled to free himself while warding off dehydration and hypothermia.
Trapped and facing certain death, Ralston chose a final option that later made him an international sensation: Using a multitool, the climber amputated his right hand, then rappelled to freedom.
A quick way to square numbers that end in 5 using the formula BY ONE MORE THAN THE ONE BEFORE.
75^2 means 75 x 75.
The answer is in two parts: 56 and 25.
The last part is always 25.
The first part is the first number, 7, multiplied by the number "one more", which is 8:
so 7 x 8 = 56