River Crossing with one Torch

Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?

River Crossing with one Torch




Similar Riddles

You bought me for dinner but never eat me. What am I?

Asked by Neha on 31 Aug 2025


what does the below math rebus puzzle mean?

Find the Rebus Meaning

Asked by Neha on 13 Nov 2023

In the picture given below, can you find out which digit will take place of the question mark?

Replace the Question Mark

Asked by Neha on 10 Nov 2025


In the image given, you can find several triangles. Can you count them all?

How Many Triangles Are There Puzzle

Asked by Neha on 17 Apr 2025

Can anyone tell me a word in the English dictionary which has a silent 'z'?

Asked by Neha on 13 Jan 2024

In a contest, four fruits (an apple, a banana, an orange, and a pear) have been placed in four closed boxes (one fruit per box). People may guess which fruit is in which box. 123 people participate in the contest. When the boxes are opened, it turns out that 43 people have guessed none of the fruits correctly, 39 people have guessed one fruit correctly, and 31 people have guessed two fruits correctly.
How many people have guessed three fruits correctly, and how many people have guessed four fruits correctly

Asked by Neha on 17 Aug 2023


One fine day, an intellectual man came to the emperor's court with the aim of testing Birbal's wittiness. In order to do this, he challenged Birbal to answer his question and hence prove that he was as intelligent and witty as he was said to be.
He asked Birbal, Do you want me to ask one difficult question or a hundred easy ones?
Since both Akbar and Birbal had had a tough day and were eager to leave, Birbal hastily told the intellectual to ask him a single difficult question.
Intellectual: OK. Tell me what came first into the world, the egg or the chicken?
Of course, the chicken, Birbal replied with a smile.
This time with a note of victory in his voice, the intellectual asked Birbal, How will you demonstrate that?
What did Birbal say?

Asked by Neha on 17 May 2021

Do You See It?

Do You See It?

Asked by Neha on 17 Feb 2022

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

Asked by Neha on 23 Feb 2023


In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

Funny Girl Puzzle

Asked by Neha on 20 May 2025

Hot Articles

Amazing Facts

Crossword

The day before the 1996 U.S. presidential election, the NYT Crossword contained the clue “Lead story in tomorrow’s newspaper,” the puzzle was built so that both electoral outcomes were correct answers, requiring 7 other clues to have dual responses.