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IQ Test For Genius Only - How Smart Are You ?(general Knowledge Teasers) / How To Improve Your Math Skills / See What Kenyan Student Did When He Was Given A Difficult Math Question In Exam (2) (3) (4)
|Enjoy Your Weekend With These Math Teasers by MaiHealth: 11:42am On Nov 14, 2020|
1. In January 1993, Cristina's age equaled the sum of digits comprised in her birth year. What year was Cristina born in?
2.Conversation between Peter and his Granny
Peter : Granny, how old are you?
Granny : Together with Grandpa, we are 140 years old, and Grandpa is twice as old as I was when he was as old as I am now.
So how old is Granny?
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|Re: Enjoy Your Weekend With These Math Teasers by NDSMELODY(m): 12:35pm On Nov 14, 2020|
|Re: Enjoy Your Weekend With These Math Teasers by Nobody: 5:39pm On Nov 14, 2020|
Let Granny be x years old, then,
Grandpa is (140 - x) years old
When Grandpa was x years old,
Granny was ½x years old.
Difference between their ages is always constant.
Therefore, (140 - x) - x = x - ½x
140 - 2x = (2x - x)/2
280 - 4x = x
280 = 5x
x = 56
Granny is 56 years old
|Re: Enjoy Your Weekend With These Math Teasers by MaiHealth: 11:05am On Nov 21, 2020|
ANSWER to last week's teasers
Thanks to those who tried it and special thanks to yGoodmann and NDSMELODY for posting their answers here
If Cristina is X years old in 1993, 1993-X will be her birth year.
Using trial and error to determine the year in which the sum of its digits will be equal to its difference with 1993, the answer will be 1973.
Check the picture below for the the second teaser's answer.
Stay tuned for this week's teasers
|Re: Enjoy Your Weekend With These Math Teasers by MaiHealth: 12:15pm On Nov 21, 2020|
1. Peter is four years older than Mark and eight years older than Paul. The product from Mark’s and John's ages is greater by 16 than the product from Peter's and Paul's ages.
Between these boys, two are twins. Give their names.
2. A thief went into a store and stole N1000 and then left the store. About 30 minutes later, the thief returned to the store and purchased an item that cost him N700. The thief paid for the item with the stolen cash and received N300 change from the cashier. The thief then left the store for a second and final time. How much did the store lose?
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