Mathematics Problems

Study Notes

A watch is sold for 240witha20240 with a 20% profit, so the cost price is 240witha20200.
A product is marked down by 20% from its original price of 50,sothesalepriceis50, so the sale price is 50,sothesalepriceis40.

A car depreciates by 10% each year, so its value after 3 years would be 14,580ifitscurrentvalueis14,580 if its current value is 14,580ifitscurrentvalueis20,000.

The letters "CIFAIPC" can be rearranged to spell "Pacific".
The letters "A E T R G" can be rearranged to spell "Great".
Two typists can type two pages in two minutes, so three typists can type 18 pages in six minutes.
The equation 3x + 5 = 2x + 10 can be solved to find x = 5.
If John is twice as old as Jane, and Jane is three years older than Mike, and Mike is 15, then John is 36.

In a class of 60 students, 45% are girls, so there are 33 boys.
The area of a rectangle with a length of 10 meters and a width of 5 meters is 50 square meters.
In a triangle with angles 50 degrees, 60 degrees, and x degrees, x = 70 since the sum of the angles is 180 degrees.
If the average of five numbers is 20, and one number is removed, the average becomes 18, then the number removed is 30.
If the perimeter of a square is 36 cm, the length of one side is 9 cm.

If sales increased from 200 units to 500 units in a year, the percentage increase is 150%.
If a pie chart shows that 40% of the budget is spent on marketing, 30% on research, 20% on development, and 10% on other expenses, and the total budget is 1,000,000,then1,000,000, then 1,000,000,then300,000 is spent on research.
If production increased from 20,000 units in 2018 to 25,000 units in 2019, the increase in production is 5,000 units.
If profit increased from 50,000inQ1to50,000 in Q1 to 50,000inQ1to75,000 in Q2, the increase in profit is $25,000.
If the population increased from 10,000 to 12,000 over a year, the percentage increase in population is 20%.

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