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A father is now three times as old as his son. Twelve years ago he...

Mathematics
JAMB 1979
A father is now three times as old as his son. Twelve years ago he was six times as old as his son. How old are the son and the father?
  • A. 20 and 45
  • B. 100 and 150
  • C. 45 and 65
  • D. 35 and 75
  • E. 20 and 60
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Correct Answer: Option E
Explanation
Son = x, Father = 3x, 12 yrs ago

son = x - 12, father = 3x - 12

3x - 12 = 6(x - 12)

3x - 12 = 6x - 72

3x = 60

x = 20
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WAEC offline past questions - with all answers and explanations in one app - Download for free
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
Post UTME Past Questions Agent
WAEC and NECO CBT Software for Computers and Laptops - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 127076
WAEC and NECO CBT Software for Computers and Laptops - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 127076