# Brain Teaser: Can You Solve This Torch And 8 Batteries Puzzle In 30 Secs?

by N Keerthana | **Updated **Nov 23, 2022

## Brain Teaser: Can You Solve This Torch And 8 Batteries Puzzle In 30 Secs?

Brain teasers are exciting puzzle that needs thinking to solve. Brain teasers make you think out of the box and exploit your mind's potential. One of the most recent brain teasers on social media and boggling many minds is Brain Teaser: Can You Solve This Torch And 8 Batteries Puzzle In 30 Secs?

Let us first have a look at what this puzzle is.

Image source: Fresherslive

## Brain Teaser: Can You Solve This Torch And 8 Batteries Puzzle In 30 Secs? - Solution

If you are still trying to get the answer to this, we have the answer to this puzzle. This brain teaser is a great way to test your observation skills and how sharp you are. If you still haven't gotten the answer, the picture given below will make you understand this solution better.

You are given a flashlight that takes 2 good batteries to run, and 8 batteries, 4 good ones, and 4 used up. What is the minimal number of trials needed to get the flashlight running?

Total batteries = 8.

Out of the 8 batteries, only 4 are in working condition.

We need 2 good batteries to run.

Let's try to divide the 8 batteries into a group of 3.

8 = 3 + 3 + 2.

Group 1 = 3 batteries,

Group 2 = 3 batteries,

Group 3 = 2 batteries.

Now you have ensured that one group has two working batteries.

How many combinations are possible for each group?

Group 1: B1 B2 B3.

Possible combinations → B1B2 , B2B3 or B1B3.

Total combinations = 3.

Group 2: B4 B5 B6.

Possible combinations → B4B5 , B5B6 or B4B6.

Total combinations = 3.

Group 3: B7 B8.

Possible combinations → B7B8.

Total combinations = 1.

Adding all the combinations = 3 (Group 1) + 3 (Group 2) + 1 (Group 3) =7.

Hence, the minimum number of trails needed = 7.

Image source: Fresherslive

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## Brain Teaser: Can You Solve This Torch And 8 Batteries Puzzle In 30 Secs?-FAQ

Many people love to solve Brain teasers, analytical puzzles, and games. Brain teasers are like a trickier version of puzzles and riddles. You have to analyze these puzzles differently and think outside of the box. You must use your creative mind because the answer to Brain teasers cannot be found easily.

A brain teaser is an exciting form of a puzzle that needs thinking to solve.