"Happiness is to senipah as 517768399 is to 9386715."
Happiness backwards is Ssenippah. Taking out the double letters gives Senipah. 517768399 backwards is 993867715. Taking out the doubles gives 9386715.
IQ questions would be found on IQ tests. These questions are intended to evaluate a variety of mental abilities and skills, and therefore cover a wide range of different types of intelligence.
Here are some general examples of the types of questions that might be found on an IQ test:
Analogies (mathematical and verbal)
Pattern driven (spatial and mathematical)
See Examples of IQ Questions at YourDictionary.
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