brain teaser May 2016 Brain Teaser Solution May 31, 2016 mathconfidence Leave a comment Answer: 98 3 x 2 + 1 = 7 5 x 4 + 3 = 23 7 x 6 + 5 = 47 9 x 8 + 7 = 79 10 x 9 + 8 = 98