Brain Challenge

Week 412 (19th September 2025) 

Week 412 (19th September 2025) 

Billy’s teacher likes to set his class a challenge each lesson.  

Today the teacher writes down a number.   

They subtract 6 from the number and then divide by 8.   

Their answer is 81.   

What number did the teacher write down?  

Answer:  

To find the number they wrote down do the inverse of the two operations   

81 x 8 = 648  

648 + 6 = 654 

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