Convert 21 from base 10 to base 2. Calculate 15% discount on N5,000. List 3 cylindrical and 3 rectangular prism household objects. Simplify 5x + 10 - 2x + 4.

The base 2 representation of 21 is:

2. Percentages: Calculate the discount on an Easter hamper

The discount is:

3. Geometry: List 3 cylindrical and 3 rectangular prism household objects

• Cylindrical Objects:
  • Tin can (e.g., for food)
  • Toilet paper roll
  • Drinking glass
• Rectangular Prism Objects:
  • Book
  • Shoebox
  • Brick

4. Algebra: Simplify the expression $5x + 10 - 2x + 4$

The simplified expression is:

5. Fractions: Calculate the fraction of cake left

The fraction of the whole cake left is:

6. Decimals: Solve $12.5 \times 0.4$ without using a calculator

12.5 has 1 decimal place.

0.4 has 1 decimal place.
Total decimal places = $1 + 1 = 2$.

The product is:

7. LCM: Find the Lowest Common Multiple (LCM) of 12, 18, and 24

For 2: The highest power is $2^3$ (from 24).
For 3: The highest power is $3^2$ (from 18).

The Lowest Common Multiple is:

8. Angles: Draw an angle of $120^\circ$ and label it correctly as "Obtuse"

An angle of $120^\circ$ is an obtuse angle because it is greater than $90^\circ$ but less than $180^\circ$.
To draw it:

• Draw a straight line segment. This will be one arm of the angle.
• Place the protractor's center on one endpoint of the line segment (the vertex). Align the baseline of the protractor with the line segment.
• Find the $120^\circ$ mark on the protractor and make a small dot.
• Draw a second line segment from the vertex to the dot.
• Label the angle as $120^\circ$ and indicate that it is an obtuse angle.

9. Word Problem: Calculate cloth needed for 6 outfits

The total meters of cloth needed is:

10. Symmetry: Draw a square and a rectangle and their lines of symmetry

• Square: A square has 4 lines of symmetry.
  • Two lines pass through the midpoints of opposite sides (horizontal and vertical).
  • Two lines pass through opposite vertices (diagonals).
• Rectangle: A rectangle has 2 lines of symmetry.
  • Two lines pass through the midpoints of opposite sides (one horizontal, one vertical).
  • (A rectangle does not have diagonal lines of symmetry unless it is also a square).

DIGITAL TECHNOLOGIES

Shortcut Challenge:

• a) Highlight your name and press Ctrl + B. What happened to the text?
  • The text became bold.
• b) Press Ctrl + E. Where did your text move to on the page?
  • The text moved to the center of the page.
• c) Press Ctrl + J three times. Did the text get smaller or larger?
  • Ctrl + J is the shortcut for Justify alignment in Microsoft Word. It aligns text to both the left and right margins. It does not make the text smaller or larger.
• d) Observation: In the "Insert" tab, click "Shapes". Draw a star. Which menu tab appears at the very top (usually in a different color) once the star is selected?
  • The Format tab (specifically "Shape Format" or "Drawing Tools Format") appears.