If the median of a set of five consecutive integers is equal to 10, find S = 1 + 2 + 3 + ... + n
, which n
is the smallest integer among those three integers.
If x + 3 = y and also y + 2y - 4 = y + 4, then find the value of x3
Roll a dice 2 times. Let x
be the number that show in the first time and y
be the number that show in
the second time. What is the probability of x + y= 4
The ratio of a rectangle length to its width is 2:1. If the area of the rectangle is 18 then find the
perimeter of the rectangle.
Let |m - 1| = n and n2
- n - 4 = n - 1 then find m + n.
The average of 20 numbers is 10, if one of them is 1. What is the average of other nine numbers?
If a + b = 3 and a2
= 17. What is the value of ab
A store sells each TV $500. If someone buys 10 TV at one time, it would give 10% discount on each TV.
What is the wholesale price of 10 TV after discount?
If x + y = 2 and x - y = z - 1. What is the value of x2
in terms of z?
According to the figure, which of the following is true? (m1
are the value of the slope of line 1 and 2 )
If the multiply if three consecutive positive integer is equal to 3n
, which n
is the second number, what is the sum of these three integers?
, then what is the value of a
in terms of b
Sarah runs x
miles every week. If she looses y
calories for every miles she runs, and she runs the same distance every day. How much calories she looses everyday in terms of x
X is 20 years older than Y. After 5 years X's age is 3 times more than Y. Find X+Y.
Find the slope of line which passes through points (1, 3) and (x, 3).
Bob wants to paint a cylinder. Each cm2
would cost $1 for him to paint. If radius of cylinder is 3 meters, and its height is h
meters. How much he has to pay in terms of h
What is the sum of the internal angles of a pentagon?
Roll a dice and flip a coin one time. What is the probability that dice shows 6?
If a segment with a slope of m
passes through point (1, 2) and (2, 1). What is the value of m2
If ab = 3
and b = -⅓
then what is the value of a2b