I saw a shirt for $ 97 . I borrowed $ 50 from mom and $ 50 from dad . I bought the shirt with $ 3 of change . I gave $ 1 to mom , $ 1 to dad , and kept $ 1 for myself . Now I owe my mom $ 49 and my dad $ 49 . $ 49 + $ 49 = $ 98 + my $ 1 = $ 99 . Where did the other $ 1 go ?
I borrowed $ 50 from mum and $ 50 from dad to buy a bag costing $ 97 . After the purchase , I had $ 3 left . I returned $ 1 to dad and $ 1 to mum , and reserved $ 1 for myself . I now owe $ 49 + $ 49 = $ 98 plus the $ 1 I reserved for myself , which is $ 99 . Where is the missing $ 1 ?