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Question

Nine of a certain type of ice-cream cone cost less than$10. Whereas ten cost more than$11. How much does each one cost?
a. $1.00 b. $1.02 c. $.1.10 d. $1.11 e. $1.12

Answer 1

It must be D) $1.11, because nine cost $9.99, which is less than $10, and ten cost $11.10, which is more than $11. Nine $1.12 items cost $10.08, so E) is out. Ten items costing $1.00, $1.02, or $1.10 cost at most $11, not more, so A), B), and C) are also out.

Answer 2

It must be D.

9 x 1.11 = 9.99 i.e. <10

10 x 1.11 = 11.10 i.e. >11