# Euler problems/151 to 160

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## Contents |

## 1 Problem 151

Paper sheets of standard sizes: an expected-value problem.

Solution:

problem_151 = undefined

## 2 Problem 152

Writing 1/2 as a sum of inverse squares

Solution:

problem_152 = undefined

## 3 Problem 153

Investigating Gaussian Integers

Solution:

problem_153 = undefined

## 4 Problem 154

Exploring Pascal's pyramid.

Solution:

problem_154 = undefined

## 5 Problem 155

Counting Capacitor Circuits.

Solution:

problem_155 = undefined

## 6 Problem 156

Counting Digits

Solution:

problem_156 = undefined

## 7 Problem 157

Solving the diophantine equation 1/a+1/b= p/10n

Solution:

problem_157 = undefined

## 8 Problem 158

Exploring strings for which only one character comes lexicographically after its neighbour to the left.

Solution:

problem_158 = undefined

## 9 Problem 159

Digital root sums of factorisations.

Solution:

problem_159 = undefined

## 10 Problem 160

Factorial trailing digits

Solution:

problem_160 = undefined