Intellectual Endurance

“Intellectual endurance” is the staying power, the capacity to persist without getting distracted. At one point your brain ceases to cooperate, but please don’t stop doing this calculation. Take a few minutes rest and start again. This is one way of developing intellectual endurance. Take a ‘single digit number’ and a ‘three digit number’ of your choice... For example, suppose the numbers are: 8 and 156, write down on a paper as 8-156. Go on adding 13 to the first number and deduct 7 from the later. Do it simultaneously (Here is the example. your first number is 8 - 156. Hence your second number would be 21-149, third 34-142). At the end... what are your final figures when you reach the single digit answer on the right hand side? Don’t jump to calculate end figures, do it step by step to test your patience.
Answer:
For the given values, the end figure is 281-9. Even if you could not calculate correctly, don’t worry. You have the capacity to work till the end, and that is ‘patience’.

Comments

Post a Comment

Popular posts from this blog

Milk and Water

A milkmaid adds 4 litres of water to 2 litres of milk before distribution. By mistake she added 2 litres water to 4 litres of milk. How much more water has she to add to rectify her mistake? Answer: Six litres. Water should be double than the milk content. the present content is 4 litres. Hence, the total water should be 8. it has 2 litres already. So, another 6 litres are to be added.
Read more

Tricky equation

Suppose a=b. With this equation, I will prove that a + b = b in four steps. Find out where (in which step) I went wrong? Step one: if a=b, then a²=ab. Step two: Deduct b² from both: (a² - b²) = (ab - b²). Step three: (a + b) (a - b) = b (a - b). Step four: Deduct (a-b) from both: a + b= b. How is this possible? In which step lies the mistake? Answer: The mistake is in step three A-B=0. You cannot conclude that 4 = 2 just because 4 x 0 = 2 x 0.
Read more