This genuinely clever math book uses rhyming couplets and riddles, as well as visual cues to help the reader find new ways to group numbers for quick counting. It’s a return to number sets, with none of those boring parentheses and signs. Here the rhyme gives a clue to the new ways of grouping numbers. For example: “Mama mia, pizza pie, / How many mushrooms do you spy? / Please don’t count them, it’s too slow, / This hot pie was made to go! / Let me give you some advice, / Just do half and count it twice.” A quick look at the pizza, and the reader can see each slice has the same number of mushrooms. Count by threes for half the pie, and double it. Each rhyme is given a double-page spread. The extra-large, brightly colored images leap off the page but never distract from the author’s intent. Some riddles are very challenging, but the author provides all the solutions in the back. Once the reader has seen the answers, the strategy is obvious and can be applied to other situations. Great fun for math enthusiasts and creative thinkers, this might also teach adults some new tricks. A winning addition. (Nonfiction. 7-10)

Picture puzzles accompanied by clues in verse encourage readers to embark on some inspired problem solving. Each riddle and an illustration are set on a two-page spread. The goofy rhymes set a humorous tone. Through patterns, grouping, and creative thinking, the problems to be solved will have children adding, subtracting, and multiplying. Throughout, Tang sneaks in useful visual strategies that can be used in solving other computation problems. Bright, appealing computer images add to the playful nature of the title. The solutions provided at the back of the volume include a miniature color reproduction of each picture and a clearly diagrammed answer along with text outlining the process employed to arrive at that answer. A fun addition to classroom and library shelves.