6 is a perfect number because sum of all its factors is twice the number itself.( 1+2+3+6 =12 =6*2).give two examples of least more perfect numbers.
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Q2
Which types of ore can be concentrated by the Froth Flotation method? Give two examples for such ores?
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Q3
Write five pairs of integers (a, b) such that a ÷ b = –3.
Example: (6, –2) because 6 ÷ (–2) = (–3).
[4 marks]
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Q4
18 isdivisible by both 2 and 3. It is also divisible by 2 ×3 = 6. Similarly, a number is divisible by both 4 and 6. Can we saythat the number must also be divisible by 4 ×6 = 24? If not, give an example to justify our answer:
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Q5
Give five examples where the number of things counted would be more than 6 digit number