Alfred Ajibola
- 01st February, 2026 @ 09:21 PM
Topics in Mathematics
Linear Equation in Mathematics Word Problems leading to Algebraic Expression BODMAS in Algebra Multiplication and Division in Algebra Addition and Subtraction in Algebra Multiplication of Number Bases Subtraction of Number Bases Addition of Number Bases Division of Number Base Number Base Conversion Number Base System Significant Figures Rounding Off Numbers Decimal Place Value Fraction Word Problems Word Problems in Fraction Multiplication and Division of Fractions Addition and Subtraction of Fractions Expressing One Quantity as a Percentage of Another Expressing One Quantity as a Fraction of AnotherAcademic Questions in Mathematics
What type of polygon is shown in the above image?
A. Nonagon
B. Decagon
C. Octagon
D. Hexagon
E. Hepagon
F. Pentagon
Which of the following is not part of a circle?
A. Section
B. Sector
C. Segment
D. Semicircle
E. Secant
F. Center
What angle is shown in the above image?
A. Complementary
B. Supplementary
C. Acute
D. Obtuse
E. Reflex
F. Straight
An angle greater than 90o but less than 180o is termed _____.
A. Complementary
B. Supplementary
C. Acute
D. Obtuse
E. Reflex
F. Straight
Factorize 12a2 - 20a + 3
A. (6a - 1)(2a - 3)
B. (6a - 1)(2a + 3)
C. (6a + 1)(2a - 3)
D. (6a + 1)(2a + 3)
E. (-6a + 1)(2a - 3)
F. (-6a + 1)(2a + 3)
Simplify 10ab + 7ab
A. 17ab2
B. 17a2b2
C. 3ab2
D. 3a2b2
E. 17ab
F 3ab
Which of the following is not a type of angle?
A. Right angle
B. Left Angle
C. Acute Angle
D. Complete Angle
E. Straight Angle
F. Reflex angle
Two lines that can never meet each other are best considered as _____ lines.
Decimal places refer to the positions of digits to the right of the decimal point (or just after a decimal point). It presents a way of representing fractions through designations like tenths, hundredths, thousandths, and so on. In this regard, decimal place values have different names and values according to how close or far away they are from the decimal point. These are summarized below:
Tenths (1st place): This is the first digit after the decimal point. For example, 3 in 0.345 represents 3 tenths.
Hundredths (2nd place): The is the second digit after the decimal point. For example, 4 in 0.345 represents 4 hundredths.
Thousandths (3rd place): The is the third digit after the decimal point. For example, 5 in 0.345 represents 5 thousandths.
Please read on the place value of numbers here.
Recall that place value is the value of each digit in a number, determined by its position. The values present before the decimal point include the thousands, hundreds, tens, unit (or ones), while those present after the decimal point are the tenth, hundredth, thousandth, etc.
The image below shows the place values of numbers.
Meanwhile, understand that after the decimal point, each place value to the right is ten times smaller than the place value to its left.
Please read on the conversion of decimals to fractions here.
To express decimal number to decimal places; for instance, one decimal place, two decimal places, three decimal places and so on, we will follow the steps below.
To one decimal place: Look at the digit in the second decimal place. If this digit is 5 or greater than 5, we'll round up the first decimal place digit by adding one to it. However, if the digit in the second decimal place is less than 5, the digit in the first decimal place will remain unchanged.
To two decimal place: Look at the digit in the third decimal place. If this digit is 5 or greater than 5, we'll round up the second decimal place digit by adding one to it. However, of the digit in the third decimal place is less than 5, the digit in the second decimal place will remain unchanged.
To three decimal place: Look at the digit in the fourth decimal place. If this digit is 5 or greater than 5, we'll round up the third decimal place digit by adding one to it. However, if the digit in the fourth decimal place is less than 5, the digit in the third decimal place will remain unchanged.
Please read on rounding off numbers here.
Please read on significant figures here.
Example 1
Solution
To express 3.6754 to one decimal place, we look at the digit in the second decimal place, which is 7. Since 7 is greater than or equal to 5, we round up the first decimal place digit by adding 1 to 6 which equals 7.
Example 2
Solution
To express 419.0088 to two decimal place, we look at the digit in the third decimal place, which is 8. Since 8 is greater than or equal to 5, we round up the second decimal place digit by adding 1 to 00 which equals 01.
Example 3
Solution
To express 0.5689 to three decimal place, we look at the digit in the fourth decimal place, which is 9. Since 9 is greater than or equal to 5, we round up the third decimal place digit by adding 1 to 568 which equals 569.
Example 4
Solution
To express 18.59495 to two decimal place, we look at the digit in the third decimal place, which is 4. Since 4 is lesser than 5, value 59 after the decimal point remains unchanged.
Example 5
Solution
To express 5.439804 to five decimal places, we look at the digit in the sixth decimal place, which is 4. Since 4 is lesser than 5, value 439804 after the decimal point remains unchanged.
You can read on the division of number base here.
Please read on word problems leading to algebraic expressions here.
1. Express each of following to two decimal places:
12.347
8.8.912
540.089
0.002311
0.124
2. Express each of the following to one decimal place.
0.75112
12.3446
6.8.9023
540.999
0.95843
3. Express each of the following to three decimal places.
1.9455
0.74052
1.2362
0.2409
0.1156
Please read on mathematics week 7 topic for jss1 first term here.
Please read on mathematics scheme of work for jss1 first term here.
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Amazing facts in Mathematics
The opposite sides of a dice will always give a sum of seven
31,556,926 seconds makes one year
From 0 through 1000, the only number that has the letter 'a' in it is 'one thousand'
÷
The division symbol '÷' is actually called an obelus
Four is the only number in the English language that is spelt with the same number of letters as the number (4) itself
40 is spelt as forty and not 'fourty'. It is the only number that is spelt with letters arranged in alphabetical order
An odd number is a number that cannot be divisible by 2.
Every odd number has an 'e' in its spelling. They include:
555 in Thailand sounds like 'hahaha'. This is because the number '5' means 'ha' in Thailand
In mathematics, 10! means 10 factorial. Below is its calculation:
10! = 10 x 9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1 = 3628800
Interestingly, 3628800 seconds is the same as 42 days
42 days is the same as 6 weeks
We can therefore say that 10! equals 6 weeks or 3628800 seconds in mathematics
When you multiply 111,111,111 by 111,111,111; the result equals 12,345,678,987,654,321
Notable points in Mathematics
Let's use algebra to explain the simple statement below:
I am a number. When you subtract 3 from me, the result is 9. what number am I ?
Of course we know the answer is 12. You probably guessed it from your mind because it was that simple. The truth is, We could have a much more complicated statement of such; and that is where algebra comes into play.
Now, to apply algebra in the above statement, we use letters or alphabets to represent the unknown number(s). So using algebra, we can write:
Let the number be y
y - 3 = 9
y = 9 + 3
y = 12
The image above shows a right angled triangle. The angle of the above right triangle is denoted as θ. Below are some points to note:
Hypotenuse is always the longest side of the triangle.
Opposite is the side opposite the angle (θ)
Adjacent is the shorter side next to the angle (θ)
Each of Sin θ, cos θ and tan θ are the ratio of sides of the right triangle. They are calculated by using the formula (margic word) sohcahtoa:
soh
Sin θ = Opposite/Hypotenuse
cah
Cos θ = Adjacent/Hypotenuse
toa
Tan θ = Opposite/Adjacent
Circumference in mathematics means the distance around the edge of a circle (or a another curved surface).
Circumference is to circle or any other curved surface
Perimeter means the distance around a square or rectangle or polygon.
Perimeter is to square or rectangle or polygon