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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?
Answer: Not 12 seconds. There are 7 segments from the first flag tot the eighth, and 11 from the first to the twelfth. He runs each segment in 8/7 seconds; therefore, 11 segments take 88/7= 12 4/7 seconds.
Solution:

find the missing number in the triangle 6, 4, 9=11 4, 2, 5 =7 then 1, 4, 9=? puzzle answer with solution
Answer: 8
Solution:
Correct answer : 8
Method-1
√9+√64=11
√4+√25=7
√1+√49= 8?
Method-2
Addition of two larger numbers minus the smaller number
(9+6)-4=11
(4+5)-2= 7
(4+9)-1= 12?
The answer to this “Missing Number in Last Triangle Puzzle“, can be explained with smart solution. Addition of two larger numbers minus the smaller number of the Triangle.
Correct answer : 8
Method-1
√9+√64=11
√4+√25=7
√1+√49= 8?
Method-2
Addition of two larger numbers minus the smaller number
(9+6)-4=11
(4+5)-2= 7
(4+9)-1= 12?
The answer to this “Missing Number in Last Triangle Puzzle“, can be explained with smart solution. Addition of two larger numbers minus the smaller number of the Triangle.