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# Tag Archives: Arithmetic

## [Soln] 2016 Japan Math Olympiad Preliminary Problem 1

2016 JMO Prelim 1. Calculate the value of and answer in the form of an integer. Advertisements

## 2016 Japan Math Olympiad Preliminary Problem 1

2016 JMO Prelim 1. Calculate the value of and answer in the form of an integer.

## [Soln] 2015 USA NIMO Problem 7

2015 USA NIMO 7. Find the number of ways a series of + and – signs can be inserted between the numbers 0, 1, …, 12 such that the value of the resulting expression is divisible by 5.

## 2015 USA NIMO Problem 7

## [Soln] Arithmetic fill in the squares

Using all the digits from 1 to 9, fill in the squares to fit the stated totals. (Credits: I learnt of this problem from Guiseppi Butel on brilliant.org.)