Percentages
Find 15% of $250.
What is $37.50?
What is the simple interest on a loan of $250 for 3 years if the interest rate is 2.5%?
What is $18.75?
Simplify: 7a2b x 4a3b
What is 28a5b2 ?
What is 273 000 000 written in scientific notation?
What is
2.73 xx10^8?
Expand:
-4x(1-2x)
What is
-4x+8x^2?
Factorise:
3m+15
What is
3(m+5)?
Increase 45 by 20%.
What is 54?
What is the final balance on an investment of $1750 at 5% p.a. simple interest for 6 months?
What is $1793.75?
Simplify:
(36x^7y^9)/(18x^5y^7)
What is
2x^2y^2?
What is 0.0000015 written in scientific notation?
What is
1.5xx10^-6?
Expand and simplify:
6(2x+5)-4(5x+2)
What is
-8x+22?
Factorise:
12x^3y^4-15x^2y^6
What is
3x^2y^4(4x-5y^2)?
Erin scored 36 out of 40 for her maths test. What percentage did she score on her test?
What is 90%?
How long must $542 be invested at a rate of 7% p.a. to earn $303.52 in interest?
What is 8 years?
Simplify:
(5a^2 xx (2a^3)^2)/((2a^4)^3
What is
5/(2a^4)?
Express the following in standard form:
1.17xx10^5
What is 117000?
Expand and simplify:
(x+2)(x-3)
What is
x^2-x-6?
Factorise:
-5xy+15x^2y^2
What is
-5xy(1-3xy)?
A shirt costing $29 was marked down to $21.75 during a sale. What is the percentage discount?
What is 25%?
What is the principal required for the simple interest to be $900 on an amount invested for 2 years at 10% p.a.?
What is $4500?
Simplify:
(4(a^2b)^3xx3a^-5b^-2)/(6ab)
What is 2?
Express the following in standard form:
4.4xx10^-4
What is 0.0004?
Expand and simplify:
(2x-3)^2
What is
4x^2-12x+9?
Factorise:
2x(m+5)+3(m+5)
What is (2x+3)(m+5)?
The original price of a set of headphones was $48 and the store owner increased the price by 20%, before dropping the price of the headphones by 25%. What was the overall change in the price?
What is $4.80?
What was the interest rate if your balance on an investment of $857 at the end of 6 years is $1268.36?
What is 8% p.a.?
Simplify:
((c^-3d^-4)^2xxc^2d^6)/(c^5d^-2)
What is
1/(c^9)?
Calculate the following and write your answer in scientific notation:
(3.21xx10^-3xx4.19xx10^4)/(5xx10^6)
What is
2.68998xx10^-5?
Expand and simplify:
(3x+4y)(3x-4y)+(x+y)^2
What is
10x^2+2xy-15y^2?
Factorise:
3x(a-1)-(a-1)
What is
(3x-1)(a-1)?