http://recordsetter.com/feed/addition?likes=10 Record Setter The new home of world records https://recordsetter.com/world-record/calculate-10-math-problems-involving-four-digit-addition-subtraction/29447 2013-05-15T14:07:49Z Fastest Time To Calculate 10 Math Problems Involving Four-Digit Addition And Subtraction https://recordsetter.com/world-record/calculate-10-math-problems-involving-four-digit-addition-subtraction/29447 <p>Samarth Bhagyesh Patel mentally solved 10 random math problems correctly involving four-digit addition and subtraction in one minute, 41.20 seconds. He is seven years old and a champion at an international math competition held in Australia.</p> ]]> https://recordsetter.com/world-record/addition-problems-solved-while-sitting-25-yearbooks/13276 2012-01-31T16:50:00Z Most Addition Problems Solved While Sitting On 25 Yearbooks https://recordsetter.com/world-record/addition-problems-solved-while-sitting-25-yearbooks/13276 <p>Ryerson Lehman-Borer solved 20 <a href="http://en.wikipedia.org/wiki/Addition">addition</a> problems while sitting on 25 yearbooks.</p> ]]>