Find the next number in the following series:
15  12  13  10  11  8  ?

What is the mathematical average of the number of weeks in a year, days in a week, and the number of days in January?

There are three times the amount of monkeys compared to elephants in a zoo. If there are 88 monkeys and elephants in total, how many monkeys are there in the zoo?

Ferguson has 8 hats, 6 shirts and 4 pairs of pants. How many days can he dress up without repeating the same combination?

16 ÷ 2.5 = ?

How many unique ways are there to arrange the letters in the word SCHOOL?

If 9999 = 4, 8888 = 8, 1816 = 6, 1212 = 0, then 1919 = ?

What is the average of all of the integers from 1 to 121 ?

Which one of the numbers does not belong in the following series?

1 - 2 - 5 - 10 - 13 - 26 - 29 - 48

Find the next number in the following series:

48  63  80  99  120  ?

Two children can build a sandcastle in 3 hours. Susan can build three times as fast as Jane. How long will it take Jane to build the castle by herself?

Lisa was both the 16th highest and 16th lowest in her mid term exam. How many students are in Lisa's class?

This sequence of four words, "triangle, glove, clock, bicycle," corresponds to this sequence of numbers "3, 5, 12, 2"

Which number logically follows this series?

4  6  9  6  14  6  ?

Jane has 2 red marbles, 4 blue marbles, and 5 green marbles, in her pocket. How many will she have to take out of her pocket to ensure that she has taken out at least one of each color?

If it takes 2 minutes to make it through the circuit and Josh is number 32 in line, how long will it be until he is done?

Ralph likes 25 but not 24; he likes 400 but not 300; he likes 144 but not 145. Which does he like:

Identify the next number in the series.
24, 12, 6, 3,  ?

Four balls are placed in a hat.

1 orange ball

1 yellow ball

2 red balls

Your friend, Guiseppe, draws 2 balls and tells you that one of them is red.

What are the chances that the other ball is red also?

What will be the height of a box which has a length of 6 cm, width of 7 cm and volume of 378 cubic cm?