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How old are the three sisters when:

• Multiplying their ages gives 36.
• The sum of their ages gives 13.
• The older blonde.

Have guessed?

RESPONSE Multiplying their ages gives 36, it is one of the eight following combinations:

36 = 2 × 3 × 6, the addition of these numbers gives the number 11.

36 = 2 × 2 × 9, the addition of these numbers gives the number 13.

36 = 4 × 9 × 1, the addition of these numbers gives the number 14.

36 = 4 × 3 × 3, the addition of these numbers gives the number 10.

36 = 18 × 2 × 1, the addition of these numbers gives the number 21.

36 = 12 × 3 × 1, the addition of these numbers gives the number 16.

36 = 6 × 6 × 1, the addition of these numbers gives the number 13.

36 = 36 × 1 × 1, the addition of these numbers gives the number 38.

There are two possible answers, since 2 + 2 + 9 is 13, and 6 + 6 + 1 — too. Remark: "Senior blonde" lets us know that she has an older daughter that does not have a twin. So, we only fit the first formula. Solution: three sisters, nine years older and two twins for two years.

According to the materials of Bernard werber


See also
Task 1 trick to get a good stretch your brain
Test: there will be Enough of your knowledge to graduate from grade 6?


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