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Citigroup: Global markets (intern position)

Question:

What is Citi's best area in terms of its Global Markets business?

Answer:

I said Latin America Emerging Markets, pretty much the only area Citi is by far ahead of the rest due to its extensive presence there.

Question:

Who is Citi's CEO?

Answer:

I said Vikram Pundit, and talked a bit about his inspirational leadership through the financial crisis.

Question:

What is 21x19?

Answer:

I worked it out aloud, starting off by working out 20x20, then 21x20, then 21x19=399

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AUTHORAnonymous Insider Comment
  • Ph
    Philo
    10 August 2011

    I think the best way is multiply 21 by 20 = 420 then 420-- 21 = 399
    Thanks

  • sc
    scamoosh
    24 January 2011

    x&2=(x+1)(x-1)+1=(x+c)(x-c)+c&2 therefore 21x19 = 20&2-1 = 400-1 = 399

    yeahhh

  • ca
    calculator
    22 January 2011

    Always decompose numbers in basis 10....
    21 *19 = 2*10*19 + 19 = 380 + 19 = 399 (fastest mental solution ever)

  • Da
    David
    9 January 2011

    21 x 19

    I would work it out like this:
    Find 21 x 20:

    21x10 = 210 x 2 = 420

    Take 21 away from 420:
    420 - 21 = 399
    Simples.

  • Ik
    Ike
    9 January 2011

    Anon above used "difference of two squares" in reverse ... which is very fast (and i didnt think of). Alternatively i went:
    (20 + 1) x 19 = 380 + 19 = 399

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