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Reverse one digit +x÷ 1.0 This App "Reverse one digit +x÷" is a arithmetic training App. And this is a searching game, too. This App is a Reverse version of my App "one digit +x÷"; This App has four categories, addition:"Reverse one digit +" subtraction:"Reverse one digit " multiplication:"Reverse one digit x" and division:"Reverse one digit ÷". Each category has 9 questions on nine stages, random 81 questions. ex. "one digit +" : Find '4 + 8' from '12'. "one 

Seeing Prime 1.0 What makes this application useful is that you are able to factor an unlimited amount of numbers at the same time. Not only that, but this app calculates primes accurate and fast! Examples: 14 digit prime = 2 seconds 15 digit prime = 7 seconds 16 digit prime = 25 seconds 17 digit prime = 1min 26 sec 18 digit prime = 4min 19 sec 

Digit Span 1.0.2 Digit Span assesses aspects of short term memory. A visual sequence of digits is presented and the user must then enter the correct sequence. Each correct answer increases the span of the subsequent test; The user can also manually adjust the span of the test. This app can also assess reverse digit span. The rate and rhythm of digit presentation can be varied to allow a more accurate measure of digit span. Easy to use interface. 

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