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biology grade 11 Riddles

biology grade 11 Riddles and more.
Finish this sequence top to bottom...
Riddle:
Look at this sequence from top to bottom. What is the next number in the sequence? 1 11 21 1211 111221 312211 ?
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The Hourglasses
Riddle:
If you have an 11 minute and 13 minute hourglass, how can you accurately time 15 minutes?
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The 15 Minutes Recipe
Riddle:
A recipe requires 15 minutes to cook. You have a 7 minutes hourglass and an 11 minutes hourglass with you. How will you measure 15 minutes using them?
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Quizzical Calendar
Riddle:
A man was found dead while on his work trip abroad. The suspects were his colleagues Mason, Bob, Lisa, and Alex. On the calendar, 3, 4, 9, 10, 11 were written in blood. How should the detectives decode the numbers to find the killer?
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Twelve Flags
Riddle:
Twelve flags stand equidistant along the track at the stadium. The runners start at the first flag. A runner reaches the eighth flag 8 seconds after he starts. If he runs at an even speed, how many seconds does he need altogether to reach the twelfth flag?
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Pizza for Golf
Riddle:
Mickey and Donald decided to take a break from shooting cartoons and played several golf matches against each other in a week. They played for a pizza at each match, but no pizzas were purchased until the end of the week. If at any time Mickey and Donald had the same number of wins, those pizzas were canceled. Mickey won four matches (but no pizzas), and Donald won three pizzas. How many rounds of golf were played?
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Eleven Plus Two
Riddle:
If eleven plus two equals one, what does nine plus five equal?
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