Here is a puzzle to test your mathematical reasoning skills.
IF
4x5=24
5x6=35
6x7=48
7x8=63
THEN
8x9=?
Here is a group of equations that have some logical pattern.
Can you find this pattern and find the number that replaces the question mark?
Please do give your best try before looking at the answer.
Scroll down to see the answer
4x5=4x5+4=20+4=24
5x6=5x6+5=30+5=35
6x7+6=42+6=48
7x8+7=56+7=63
8x9+8=72+8=80
Correct answer is 80
70 Math reasoning problems-eBook
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.
80
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