can ' t do algebra stupidThat ' d be an instant deal breaker . If I EVER found out my SO couldn ' t perform basic algebra , I ' d probably dump them immediately . Trig ? OK , sure , not everybody had a chance to learn trig . Can ' t tell me what a Cartesian graph aka Cartesian Coordinate Plane is ? GTFO . If you can ' t plot y x , or any variant of , then gtfo . If you can ' t tell me what is to an accuracy of hundredths , then gtfo . 3 . 14 , it ' s 3 . 14 If you can ' t tell me how to FOIL First Outside Inside Last , then gtfo . E . G . 3 xy 3 x 3 y or x 52 x 2 10 x 25 If it EVER comes up in conversation that you don ' t balance your math or reorder your problems , gtfo . If you do shit like 3 y 5 x 3 , and you solve for 3 y , not for y , gtfo . I was grading a test in high school as a TA . Kid year below me literally put that 3 y 3 or something . Likethe fuckYou ' re smart enough to get the right answer , but not to simplify it ? Gtfo . Wrong . Teacher agreed with the wrong mark thankfully ! And finally , if you can ' t tell me the values of the basic SI units , gtfo . Talking kilo and milli primarily .