IQTEST

Set to 9 different clues across 9 published puzzles, most often “Measure of brainpower” — The New York Times, Thursday, 19 August 2010.

6 letters

Every clue on record, most used first

Measure of brainpoweronce
The New York Times — Thursday, 19 August 2010
Sharpness gaugeonce
The New York Times — Friday, 20 November 2009
Brightness detectoronce
The New York Times — Sunday, 7 June 2009
Many people get 100 on itonce
The New York Times — Saturday, 26 July 2008
Grade school administration, maybeonce
The New York Times — Sunday, 23 December 2007
Hurdle for Mensa membershiponce
The New York Times — Wednesday, 31 October 2007
It might ask "What comes next?"once
The New York Times — Saturday, 16 June 2007
*Measure of brightnessonce
The New York Times — Sunday, 13 August 2006
Brainpower measureronce
The New York Times — Monday, 5 February 2001