Do not go to the next calculation before you have finished the previous one. You do not need to write or remember the answers, just do it using your mind. You'll be surprised.
Start:
How much is:
15+6
3+56
89+2
12+53
75+26
25+52
63+32
I know! Calculations are hard work but it's nearly over..
Come on, one more...
123+5
QUICK! THINK ABOUT A TOOL AND A COLOR!
Scroll further to the bottom...
A bit more...
You have just thought about a red hammer, haven't you????
If this is not the case, you are among 2% of people who have a "different" if not "abnormal" mind. 98% of the folks would answer a "red hammer" while doing this exercise.
If you do not believe this, pass it around and you'll see. Be sure to put in the subject line if you are among the 98% or the 2% and send to everyone, including the person that sent it to you. Those who chose a lime colored Bull dozer seek help immediately
If you thought a set of PINK Burdizzo's you REALLY need help...
A-1 
