Astronomers go to the ends of the Earth to see cosmic carbon

Question #01
                               What is the 4-digit number in which the first digit is one fifth of the last, and the second and third digits are the last digit multiplied by 3? 

(Hint: The sum of all digits is 12.)

Solution:

1,155

Question #02
                               Find the number that best completes the following sequence:
1 2 4 7 11 ? 22

Solution:

16 (each number adds 1, 2, 3, 4, 5, and 6, respectively, to the preceding number)

Question #03

                            Marian bought 4 oranges and 3 lemons for 90 cents. The next day, she bought 3 oranges and 4 lemons for 85 cents. How much did each lemon and orange cost?

Solution:

Oranges cost 15 cents each; lemons cost 10 cents each.

Question #04

                           Start with the number of total mittens lost by 3 kittens, and multiply by the voting age in the United States. What's the answer?

 Solution:

216 (3 kittens @ 4 mittens each = 12 x 18).

Question #05

                           There is at least one 9-letter word that contains only 1 vowel. Do you know what it is?

 Solution:

Strengths

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