How can you measure nine minutes with have two hourglasses, one four minute and one seven minute?
Answer: Turn over both hourglasses at once. When the four-minute hourglass runs out, turn it over. When the seven-minute hourglass runs out, turn it over. When the four-minute timer runs out this time (eight minutes have elapsed), the seven-minute hourglass has been running for one minute. Now turn over the seven minute timer back over. When the timer runs out, nine minutes have elapsed.
Solution:
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Turn over both hourglasses at once. When the four-minute hourglass runs out, turn it over. When the seven-minute hourglass runs out, turn it over. When the four-minute timer runs out this time (eight minutes have elapsed), the seven-minute hourglass has been running for one minute. Now turn over the seven minute timer back over. When the timer runs out, nine minutes have elapsed.
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Antonyms Quiz: CAN YOU SCORE 10/10 ON THIS QUIZ? #challenge 1
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An antonym is a word that means the opposite of another word.
For example: hot and cold are antonyms, as are good and bad
0:11 What is the antonym for ‘Lively’?
0:25 What is the antonym for ‘Hinder’?
0:40 What is the antonym for ‘Flexible’?
0:55 What is the antonym for ‘Blunt’?
1:09 What is the antonym for ‘Cautious’?
1:24 What is the antonym for ‘Criminal’?
1:39 What is the antonym for ‘Foreign’?
1:53 What is the antonym for ‘Modern’.?
2:08 What is the antonym for ‘Complacent’?
2:22 What is the antonym for ‘Ignorant’?
An antonym is a word that means the opposite of another word.
For example: hot and cold are antonyms, as are good and bad
0:11 What is the antonym for ‘Lively’?
0:25 What is the antonym for ‘Hinder’?
0:40 What is the antonym for ‘Flexible’?
0:55 What is the antonym for ‘Blunt’?
1:09 What is the antonym for ‘Cautious’?
1:24 What is the antonym for ‘Criminal’?
1:39 What is the antonym for ‘Foreign’?
1:53 What is the antonym for ‘Modern’.?
2:08 What is the antonym for ‘Complacent’?
2:22 What is the antonym for ‘Ignorant’?


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