By Panos Kalliantasis
Test your reasoning skills
Can you find the logical relation of the equations and then find the missing number?
If
4*5=21
5*6=38
6*7=69
Then
7*8=??
Try to solve it yourself and discover the rule that the equations follow.
Scroll down to see the answer
The pattern is:
A*B+(1^3,2^3,4^3,5^3,......)
4*5+1^3=20+1=21
5*6+2^3=30+8=38
6*7+3^3=42+27=69
7*8+4^3=56+64=120
Correct answer is 120
70 selective math reasoning exercises to practice various arithmetic reasoning patterns
Try to solve them yourself and discover the rule that the equations follow.
In each exercise the answer and detailed reasoning are given to compare your answers and interactively develop your skills.
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