Problem of the Week

A new problem every Monday that challenges participants of all ages to think creatively and apply their math skills. Perfect for a weekly mental challenge.

200-299

Posted: July 1, 2024

55 % of users got this correct

You are given a set of 100 integers from 200 to 299 inclusive. Within this set are pairs of consecutive integers such as 201 + 202 that can be added without regrouping. Other consecutive pairs such as 207 + 208 require regrouping of a 1 to the tens place. How many pairs of consecutive integers in the set can be added without regrouping? (201 + 202 is the same pair as 202 + 201)

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