Two schoolgirls were traveling from the city to a dacha (summer cottage) on an electric train. “I notice,” one of the girls said “that the dacha trains coming in the opposite direction pass us every 5 minutes. What do you think-how many dacha trains arrive in the city in an hour, given equal speeds in both directions?” “Twelve, of course,” the other girl answered, “because 60 divided by 5 equals 12.” The first girl did not agree. What do you think?
Answer: If the girls had been on a standing train, the first girl's calculations would have been correct, but their train was moving. It took 5 minutes to meet a second train, but then it took the second train 5 more minutes to reach where the girls met the first train. So the time between trains is 10 minutes, not 5, and only 6 trains per hour arrive in the city.
Solution:
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If the girls had been on a standing train, the first girl’s calculations would have been correct, but their train was moving. It took 5 minutes to meet a second train, but then it took the second train 5 more minutes to reach where the girls met the first train. So the time between trains is 10 minutes, not 5, and only 6 trains per hour arrive in the city.
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if 2+9=711 then find 12+3=??? number Puzzle with answer
Answer: 915
Solution:
if you look at the question we have equations as
2+9=711
14+6=820;
17+11=628
then 12+3=??
from Equation 1
2+9=711
2+9=(2-9)(2+9)
= 711
here we used a formula called a+b=(a-b)(a+b)
similarly for remaining equations
Equation:2
14+6=(14-6)(14+6)=820
Equation:3
17+11=(17-11)(17+11)=628
now we have 12+3=??
12+3=(12-3)(12+3)=915
12+3=915 is the correct answer
if you look at the question we have equations as
2+9=711
14+6=820;
17+11=628
then 12+3=??
from Equation 1
2+9=711
2+9=(2-9)(2+9)
= 711
here we used a formula called a+b=(a-b)(a+b)
similarly for remaining equations
Equation:2
14+6=(14-6)(14+6)=820
Equation:3
17+11=(17-11)(17+11)=628
now we have 12+3=??
12+3=(12-3)(12+3)=915
12+3=915 is the correct answer
Find the missing number in this math puzzle |26, 48 , ?
Answer:
Solution:
Find The Missing Number Math Table Puzzle || Missing Number puzzle Missing Number Reasoning is all about finding an unknown number of a given series. Almost all the government examinations ask questions on the mission number reasoning section.
Solution:
3³ − 1 = 27 − 1 = 26
7² − 1 = 49 − 1 = 48
4² − 1 = 16 − 1 = 15
Answer:15
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Find The Missing Number Math Table Puzzle || Missing Number puzzle Missing Number Reasoning is all about finding an unknown number of a given series. Almost all the government examinations ask questions on the mission number reasoning section.
Solution:
3³ − 1 = 27 − 1 = 26
7² − 1 = 49 − 1 = 48
4² − 1 = 16 − 1 = 15
Answer:15
6000+ Brain teasers with answers : https://thinkmad.in/brain-teasers/
Unlimited Friends/love/sister dare quizzes : https://thinkmad.in/quizzes/
Create own SLAM BOOK : https://thinkmad.in/slam-book/
Send secret message : https://thinkmad.in/msg-me/
Emoji Game : https://thinkmad.in/emoji/
Flames Game : https://thinkmad.in/flames/ #Puzzles #Riddles #answers #questions #thinkmad Share your answers and thoughts in the comments box below
For daily Puzzles and Riddles updates: Subscribe ▶ https://bit.ly/thinkmad Thank you !…
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