# Euler problems/151 to 160

From HaskellWiki

## Contents

## Problem 151

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

Solution:

```
problem_151 = undefined
```

## Problem 152

Writing 1/2 as a sum of inverse squares

Solution:

```
problem_152 = undefined
```

## Problem 153

Investigating Gaussian Integers

Solution:

```
problem_153 = undefined
```

## Problem 154

Exploring Pascal's pyramid.

Solution:

```
problem_154 = undefined
```

## Problem 155

Counting Capacitor Circuits.

Solution:

```
problem_155 = undefined
```

## Problem 156

Counting Digits

Solution:

```
problem_156 = undefined
```

## Problem 157

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

Solution:

```
problem_157 = undefined
```

## Problem 158

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

Solution:

```
problem_158 = undefined
```

## Problem 159

Digital root sums of factorisations.

Solution:

```
problem_159 = undefined
```

## Problem 160

Factorial trailing digits

Solution:

```
problem_160 = undefined
```