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MATHEMATICS-Bodmas, Decimals, Fractions, Indices & Equations,
10 Quick revision questions and answers
1. (a)Evaluate 12 - 6 3 4
Answer: use BODMAS
6 , -2+4=2
12+2=14
(b)Evaluate 0.3 1.5
Answer: first convert into fractions
(c) Evaluate
Answer: since the denominators need a common denominator
of . Just cross multiply and subtract.
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(d) Evaluate
Answer: you should maintain , but should change to .
2. Write the number 0.034 in standard form.
Answer: First convert 0.034 in standard form and then use indices.
0.034=
3. Solve the simultaneous equations below.
Answer: from the two equations, it is clear that we should use
substitution method by making as the subject of formula.
Then multiply 4 by
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Collect like terms
4. Express 500 as the product of its prime factors.
Answer: see how I am doing it.
500=5
500=5
500=5 , there are now three fives and two twos.
500=
5. Given that M= N=
Find the value p and q when
(i) M (ii) M (iii)
Answer: (i) , p=5, q=4
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(ii) , p=-3, q=0
(iii) , p=8, q=4
6. Factorise to find the value of y,
Answer :( 3y+2) (y-3) =0, y=
7. Simplify
Answer: first work on things inside the brackets using rules of indices.
The final answer is .
8. Solve the equation
Answer: multiply 5 by
Collect like terms
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9.
From the numbers listed above, write down
(a) a square number- Answer:81
(b) a cube number- Answer: 8
(c) an irrational number Answer:
10.Find the value of n, if
Answer:
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