Inspired by the puzzle that my wife's grandma tests me with each time I visit.
Start with the number in the first box and follow the instructions until you get to the end. Enter your answer and press enter (or click on the timer).
Licence
Copyright 2015 Christian Lawson-Perfect
Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.