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Forehead numbers brain teaser | Puzzles | Math for fun and glory | Khan Academy

207,326 views

Khan Academy

Video Language:

  • English

Caption Language:

  • {{captionLanguage | language_name}} ({{captionLanguage}})

Accent:

  • English (US)

Speech Time:

94%
  • 11:27 / 12:08

Speech Rate:

  • 187 wpm - Fast

Category:

  • Education

Tags :

Intro:

Video Vocabulary

logicians

/ləˈjiSH(ə)n/

noun other

expert in or student of logic. Person skilled at symbolic logic and reasoning.

numbers

/ˈnəmbər/

noun other verb

arithmetical value expressed by word, symbol, or figure. Symbols such as 1, 2, 56, 793. To assign a sequence within a group, series, set.

logically

/ˈläjək(ə)lē/

adverb

according to rules of logic or formal argument.

another

/əˈnəT͟Hər/

adjective determiner pronoun

One more, but not this. One more added. One more (thing).

teasers

/ˈtēzər/

noun other

person who makes fun of or provokes others in playful or unkind way. Particularly difficult or baffling puzzles.

perfect
adjective noun verb

as good as is possible. perfect tense. To do something so well, it cannot be done better.

infallible

/inˈfaləb(ə)l/

adjective

Never wrong, failing or making a mistake.

dungeon

/ˈdənjən/

noun verb

Dark underground room in a castle used as a prison. imprison someone in dungeon.

actually

/ˈak(t)SH(o͞o)əlē/

adverb

as truth or facts.

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