Challenge: Can you solve this math problem for middle schoolers – without a calculator?
Classic brain training methods are perhaps puzzles like crosswords or sudoku, but I have recently become more attracted to the type of challenge you’ll see below.
These puzzles have been flooding the web lately, probably because they are really fun!
These are old classic mathematical problems. When you were in middle or high school.
These math problems are more fun when you find yourself trying to remember the math you learned as a child.
Can you figure out the correct solution?
Here is the challenge, in the picture below.
At the top of the picture, we see the task and then four possible answers.
Which solution do you think is the correct one?
How did you come up with it?
Take your time and think about it to find the correct solution.
Done? Below you can check if you picked the right number!
A
B
C
The correct answer
The correct answer is B: 12.
Why is 12 the correct answer?
Well, if you remember from your school days, according to the order of operations, you do multiplication before addition and subtraction, so you start by solving 3 x 3, which results in 9.
Then we are left with a simpler math problem: 3 + 9 – 3 + 3
The answer is therefore 12.
Did you pick the correct number? Congratulations!
Fаrmеr Аnd 16 Соws Fоund Dеаd, Саusе Оf Dеаth Finаlly Disсоvеrеd
Note: we are republishing this story to raise awareness for the Mike Biadasz farm safety and education memorial fund. Learn more at their Facebook page here as well as their website here.
A farmer and 16 of his cattle have died in a freak accident after a “dеаdly dome of air” formed in a Wisconsin farm’s manure holding tank.!!
According to WAOW, a 29-year-old farmer named Michael Biadasz, from Amherst, Wisconsin, died of gas poisoning on his family’s farm after being overcome by fumes of either methane or sulfur oxide. Initially, 13 of the farm’s cattle died as well; later, three more expired, bringing the total to 16 cattle dеаths.
The 29-year-old’s father, Bob Biadasz, co-owner of Biadasz Farms, said that the tragedy was the result of a “perfect storm” of unusual and unexpected weather conditions. When the tank was prepped to be pumped, warm upper air temperatures trapped the gases in a dome of air which then poisoned Michael and the cattle.
Biadasz was reportedly found dеаd when other workers arrived to begin hauling manure away from the tank.
“The family is devastated, absolutely devastated,” Portage County Coroner Scott Rifleman told WAOW.
Rifleman told WSAW that gas poisoning dеаths typically occur in closed areas, making the incident even more surprising. The coroner said that atmospheric pressure prevented the gases from dissipating.
The coroner went on to say that an investigation is underway to determine exactly what caused Biadasz’s dеаth. According to Rifleman, Biadasz had safely emptied the same tank hundreds of times prior to the fatal incident.
The Biadasz family honored Michael by parking a line of tractors and machinery along the road that passes the farm. Among the vehicles parked are a blue tractor, several red trucks, and Michael’s black pickup truck…
“As if there isn’t already enough dаngеr in the lives of farmers, this family had to suffer this freak accident,” one Facebook user commented on the story. “So sad.”
Following the tragic accident, many are calling for tougher regulations to be placed on manure holding tanks to prevent a similar incident in the future. According to All That’s News, the National Agriculture Safety Database says that there should be proper ventilation in areas where animals are stored and that warning signs must be posted nearby.
“In addition to adhering to proper construction and maintenance procedures for liquid manure storage facilities, owners should be encouraged to follow a few precautionary measures to protect both workers and livestock from harmful manure gases,” the NASD writes.
WASW reports that a similar unfortunate fate befell a Virginia family in 2007, when five of its members died as a result of a pipe blockage that caused a fatal buildup of methane gas.
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