TimeTree HD vs Basic Arithmetic Practice Pro

TimeTree 4 is a public knowledge-base for information on the evolutionary timescale of life. This application allows easy exploration of the thousands of divergence times among organisms in the scientific literature. A tree-based (hierarchical) system is used to identify all published molecular time estimates bearing on the divergence of two chosen organisms, such as species, compute summary statistics, and present the results. Names of two taxa to be compared are entered in the search window and the results are presented on a set of self-explanatory tabs. TimeTree 4 contains data from 2,274 studies including 50,632 species. We will be adding more data in the future as it comes in from researchers. TimeTree 4 requires iOS 8.0 or newer. The TimeTree project is jointly directed by Blair Hedges (Center for Biodiversity, Temple University) and Sudhir Kumar (Institute for Genomics and Evolutionary Medicine, Temple University). This project has been supported, in part, by grants from the National Science Foundation, National Institutes of Health, NASA Astrobiology Institute, and Science Foundation of Arizona.

Basic Arithmetic Practice is a simple and effective learning app designed to strengthen your foundation in numbers, operations, fractions, percentages, ratios, and powers. With structured MCQ based practice sets, the app makes learning mathematics interactive and exam ready. It is ideal for school students, competitive exam aspirants, and anyone looking to improve essential arithmetic skills. The app provides clear explanations and step by step practice to help you build accuracy, speed, and confidence in solving everyday math problems. Topics Covered Numbers and Place Value Understand natural numbers, whole numbers, and integers. Learn place value, rounding, and comparing numbers. Addition and Subtraction Practice basic addition, subtraction, carrying, borrowing, word problems, and verification methods. Multiplication and Division Learn multiplication, division, long division steps, factors, remainders, and real world applications. Fractions and Decimals Master proper and improper fractions, mixed numbers, decimal place values, conversions, and comparisons. Percentages and Ratios Understand percentage calculations, conversions, ratios, proportions, increase and decrease. Powers and Roots Practice squares, cubes, square roots, cube roots, exponents, and simplifying expressions. Key Features Covers essential arithmetic topics MCQ based practice for revision Suitable for students and exam preparation Helps improve speed and accuracy Clear explanations for better understanding Why Choose Basic Arithmetic Practice The app helps you build strong number skills through quiz based learning and topic wise practice. Each section is designed to support school exams, competitive tests, and daily problem solving. Download Basic Arithmetic Practice today and strengthen your foundation in arithmetic with simple, clear, and effective practice.