If 1+4=5, 2+5=12, and 3+6=21, then what is the value of 5+8? - Quora
MondayMaths: Who Can Tell Me The Answer To This Puzzle - Myschool
Jungle Sudoku: for Kids Ages 6-12 | Over 350 Fun Sudokus for Children Includes Instructions and Solutions | 4x4, 6x6 & 9x9 Puzzle Grids - Easy to hard: | 8.5 x 11