An index number is a number which is raised to a power. The power, also known as the index, tells you how many times you have to multiply the number by itself. For example, 25 means that you have to multiply 2 by itself five times = 2×2×2×2×2 = 32.
On this page you will find few practice question in Mathematics (Indices) which will enhance your preparation for the forthcoming GCE Exam.
TOPIC: INDECES
Watch the video tutorial below, for detailed explanation of Indices, then answer the questions that follows, below the video.
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There are a number of important laws of index numbers:
- ya × yb = ya+b
Examples
24 × 28 = 212
54 × 5-2 = 52
- ya ÷ yb= ya-b
Examples
39 ÷ 34 = 35
72 ÷ 75 = 7-3
- y -b = 1/yb
Examples
2-3 = 1/23 = 1/8
3-1 = 1/3
- ym/n = (n√y)m
Examples
161/2 = √16 = 4
82/3 = (3√8)2 = 4
- (yn)m = ynm
Example
25 + 84
= 25 + (23)4
= 25 + 212
- y0 = 1
Example
50 = 1
INDICES: MATHS WAEC GCE PRACTICE QUESTIONS
NOTE: TYPE YOUR ANSWERS INTO THE COMMENT BOX BELOW THESE QUESTIONS, THE CORRECTIONS WILL BE POSTED SOON.
Simplify 8n×22n÷43n
- A. 2−n
- B. 21−n
- C. 2n
- D. 2n+1
Solve: 4(2x2) = 8x
- A. (1, 2)
- B. (1, -2)
- C. (-1, 2)
- D. (-1, -2)
TYPE YOUR ANSWERS INTO THE COMMENT BOX BELOW THESE QUESTIONS, THE CORRECTIONS WILL BE POSTED SOON.
