## Question 7

Which number should replace the question mark?

### Explanation

The number in the middle of the first triangle is found with the folowing calculation: 38 + 15 + 2 = 55
The number in the middle of the second triangle is found with the folowing calculation: : 7 + -6 + 6 = 7
Therefore the question mark should be replaced with the number: 7

### Question statistics

Overview
Question ID: qDE7fzSa
Main category: Numerical Reasoning
Sub category: Math triangles
Difficulty Level: 13What is item difficulty?
Nr of times answered: 3014
Average IQ of people who answered this question: 109.41
Percentage of answers correct: 53.05%
Item Response Theory (IRT)What is Item Response Theory?
Item difficulty: 13 / 20What is item difficulty?
Discrimination: 1.91 What is item discrimination?
Point of Maximum Information: 109.94 What is Point of Maximum Information?
##### Item Characteristic Curve (ICC)
Distractor AnalysisWhat is distractor analysis?
Average IQ of people who gave the correct answer: 112.58
Average IQ of people who gave an incorrect answer: 104.93
Response Time Analysis
Optimal time to spend on question: 38 seconds What is the optimal response time?
##### Optimal time to spend on question

Time spent: you used seconds to answer this question