A preschool quiz on equal collections and one-to-one matching - pairing bunnies with carrots, hats with heads, animals with treats, and spotting groups that hold the same number even when the objects look different
A preschool quiz on comparing quantities — more, fewer, the most, the same, and counting groups up to 12. Kids count cheerful trays of apples, cookies, stars and fish, decide which has more, sort fewest-to-most, and spot equal amounts
A playful preschool quiz on putting numbers 0–20 in order - what comes next, what comes before, and which number is missing. Kids tap, drag and giggle along with a chugging train, a wiggly caterpillar and a countdown rocket.
Find mean, median, mode, and standard deviation, explore the normal distribution and z-scores, and calculate permutations, combinations, and binomial probabilities - with every step shown
A mixed review: proper equations, the activity series, double-replacement errors, reaction-type overlaps with redox, oxidation numbers, and disproportionation
This quiz covers scientific notation, metric prefix conversions, speed conversions, temperature scales, and density calculations. Question formats are mixed (multiple choice, multiple-answer, match, classification, sort, and drag-and-drop) with answer options randomized throughout
Add, multiply, find determinants and inverses, row-reduce, solve linear systems, and compute eigenvalues - type matrices with a true math editor and see every step worked out.
Differentiate, integrate, and evaluate limits — type an equation with a true math editor, see every rule applied step by step, and plot the function alongside its result.
Self-contained scenario questions on technology obsolescence, impact analysis, sociotechnical risk, reengineering strategy, support software risk, metrics programs, and professional responsibility
The five-stage reengineering process (translation, reverse engineering, restructuring, modularization, data reengineering), its cost/risk advantages over replacement, and legacy system wrapping
Predicting future change volume, the complexity-maintainability link, and process metrics (impact analysis time, outstanding requests) used to spot declining maintainability
The three maintenance types (fault repair, environmental adaptation, functionality addition), naming inconsistencies, and how effort is distributed across them
What makes a system "legacy," why it's more than just code, and the six interconnected components (hardware, software, data, business processes, policies)
How change proposals drive evolution, the change identification/evolution cycle, and the core activities: impact analysis, release planning, implementation, and release.
The difference between the evolution phase (major changes) and servicing phase (small essential changes) in a system's life, and what happens at retirement.
