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Factor products, divisibility decisions, common multiples and spreadsheet rules.
Free examples and worked answers. No account needed.
Practise the method.
Factor products, divisibility decisions, common multiples and spreadsheet rules.
Factor products, divisibility decisions, common multiples and spreadsheet rules.
Example 1
A spreadsheet has 8 in A1. Cell A2 uses =A1+8; this rule is filled down, adding 8 each row. What value is in A12?
Show worked answer
Answer: 96
- The rows hold 8,16,24, …, the multiples of 8.
- Row 12 contains 12×8=96.
Example 2
A program lists positive multiples of 12 and of 9. What is the first number appearing in both lists?
Show worked answer
Answer: 36
- Compare positive multiples of 12 with positive multiples of 9.
- The least common multiple is 36; it is the first shared value.
Example 3
A spreadsheet has 12 in A1. Cell A2 uses =A1+12; this rule is filled down, adding 12 each row. What value is in A10?
Show worked answer
Answer: 120
- The rows hold 12,24,36, …, the multiples of 12.
- Row 10 contains 10×12=120.
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