GRE Math

Question 1

Permutation - n objects; r number of ways

Answer 1

n! / (n-r)! (ORDER MATTERS)

Question 2

Combination - n objects; r number of ways

Answer 2

n! / [(n-r)! r!] (ORDER DOESN’T MATTER)

Question 3

Synonyms to SUPPORT

Answer 3

CREDENCE, CONFIDENCE, CREDULITY, BOLSTER, BUTTRESS, SHORE UP, SUSTAIN, UNDERPIN, UNDERGIRD, UPHOLD

Question 4

Synonyms to WEAKEN

Answer 4

saps, softens, cripples, disables, hamstrings, damages, harms, hurts, impairs, invalidates, breaks down, dilutes, waters down, corrupts, fouls, poisons, pollutes, infects, spoils, sullies, taints, cheapens, degrades, misrepresents, attenuates, wilts, withers

Question 5

Synonym to STRENGTHEN

Answer 5

fortifies, strengthens, improves, bolsters, buttresses, shores up, richen, enriches,

Question 6

Synonyms to IMPROVE

Answer 6

invigorate, rejuvenate, vitalize

Question 7

Synonyms to CONVINCE OTHERS

Answer 7

energize, invigorate, recruit,