How many times does X occurs in the diagram here.
Problem #2
The product of three counting numbers is 24. How many different sets of 3 numbers have this property if the order of the 3 numbers in a set does not matter?
Problem #3
Carol spent exactly $1 for some 5 cents stamps and some 13 cents stamps. How many 5 cents stamps did she buy?
Problem #4
In the addition problem here, there are three two-digit numbers in which different letters represent different digits. What digits do A, B, and C represent?
Problem #5
Let N be a number that divides 171 with a remainder of 6. List all the two-digit numbers that N can be.
Problem #6
The result of multiplying a counting number by itself is a square number. For example, 1, 4, and 9 are each square numbers because 1X1=1, 2X2=4, and 3X3=9. What year in the 20th century (the years 1901 through 2000) was a square number?
Problem #7
A group of 12 girls scouts had enough food to last for 8 days when they arrived in camp. However, 4 more scouts joined them without the amount of food being increased. How long will the food last if each scout is given the same daily ration as originally planned?
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