10
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If

THOMAS X ABRAHAM = ALEXANDER

ALEXANDER X THOMAS = ANDREW

ANDREW X ABRAHAM = BENJAMIN

BENJAMIN / THOMAS = ?

Choose from 1 ABRAHAM 2 ANDREW 3 ULYSSES 4 GEORGE

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1
  • 3
    $\begingroup$ This puzzle would be a great contribution to this month's MTC - a prime example of a puzzle easily solvable on a mobile. $\endgroup$
    – Stiv
    Jul 11, 2023 at 23:12

1 Answer 1

13
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The answer is:

3 ULYSSES

As in each case, the names represent...

...people on US banknotes of particular denominations.

GEORGE (Washington) on the \$1 bill;
THOMAS (Jefferson) on the \$2 bill;
ABRAHAM (Lincoln) on the \$5 bill;
ALEXANDER (Hamilton) on the \$10 bill;
ANDREW (Jackson) on the \$20 bill;
ULYSSES (S. Grant) on the \$50 bill;
BENJAMIN (Franklin) on the \$100 bill.

Substituting these in to our equations gives:

THOMAS (2) X ABRAHAM (5) = ALEXANDER (10)
ALEXANDER (10) X THOMAS (2) = ANDREW (20)
ANDREW (20) X ABRAHAM (5) = BENJAMIN (100)

So...

BENJAMIN (100) / THOMAS (2) = ULYSSES (50)

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