The journey of every round

If a train travels 60 miles in 1.5 hours, what is its speed in miles per hour?

What is the square root of 169?

Calculate the area of a rectangle with width 8 and length 13.

What is the sum of integers from 1 to 100?

What is 12 percent of 350?

Use ILogger<T>.LogInformation to log a message with an exception parameter.

Write a LINQ query to filter a list of objects by a property.

Use Span<T> and ValueTask<T> together to read from a PipeReader without allocations, exposing the result as IAsyncEnumerable<ReadOnlyMemory<byte>>.

Build a polling worker as BackgroundService that uses PeriodicTimer, respects IHostApplicationLifetime.ApplicationStopping, and emits Activity tags.

Find orders where the order_date is later than the ship_date.

Write a SQL query that returns products and their cumulative sales over time.

Write a SQL query that returns the top 5 customers by total spend in 2025.

The retailer is asking me to wait 4 weeks for a repair on a faulty appliance. Is that reasonable?

What is the greatest common divisor of 36 and 48?

Calculate 25 squared minus 24 squared.

Write a query that calculates a running total using Aggregate

Implement an async circuit breaker that tracks consecutive failures

Implement async producer-consumer pattern using Channel<T>

Implement idempotency key middleware that deduplicates POST requests

Implement an async circuit breaker that tracks consecutive failures

Implement async producer-consumer pattern using Channel<T>

Implement a webhook delivery endpoint with HMAC signature verification

Implement idempotency key middleware that deduplicates POST requests

Implement an async circuit breaker that tracks consecutive failures