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Number Puzzle #188 – solve equation

July 14, 2019 by Nay Mosupi Leave a Comment

Number Puzzle #188

If 7×7 = 12

5×5 = 8

3×3 = 4

2×2 = 2

Then 6×6 = ?

Check your answer:-

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Click here to See SolutionHide
it follows this pattern
axa = (a-1) + (a-1)

thus 6×6 = 5 + 5 = 10

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Number Puzzle #187

July 11, 2019 by Dastaan Pathan Leave a Comment

Number Puzzle #187

0 3 14 2 1 : 2 10 24 6 8 : 4 14 ? 5 6

Check your answer:-

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Click here to See SolutionHide
Answer is 71

as numbers add upto a multiple of 10 in every atom.

ex. 0 + 3 + 14 + 2 +1 =20
2 + 10 + 24 + 6 + 8 = 50
only option which can make the sum to a multiple of 10 for 4 + 14 + 5 + 6 is 71.

answered by Ram Balaji in disqus comments

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Number Puzzle #184

June 17, 2019 by Vaibhav Soni 1 Comment

What number should replace the question mark?

Math vaibhav rvm

Check your answer:-

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Answer With ExplanationHide
Its actually pretty simple

all the rows sum is 15

first row => 9 + 1 + 5 => 15
second row => 4 + 8 + 3 => 15
third row => 2 + ? + 7 => 15 => ? = 15 – 7 -2 => 6

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Math Puzzle – fill the boxes

June 12, 2019 by Waseem Ehsan Leave a Comment

Solve this one in a minute

fill in the boxes
Plz answer this

Check your answers:-
Box 1 (top left)

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Box 2 (top right)

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Box 3 (bottom left)

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Box 4 (top right)

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Click here to See SolutionHide

Let’s quickly write the equations

B1 + B2 = 14

B1 + B3 = 15

B2 + B4 = 16

B3 – B4 = 10

by adding all equations

B1 + B2 + B3 = (14 + 15 + 16 + 10 )/2 = 55/2 = 27.5

B3 = 27.5 – (B1 + B2) = 27.5 – 14 = 13.5 => B3 = 13.5

B2 = 27.5 – (B1 +B3) = 27.5 – 15 = 12.5 => B2 = 12.5

B1 = 14 – B2 = 14 – 12.5 = 1.5 => B1 = 1.5

B4 = B3 – 10 = 13.5 – 10 = 3.5 => B4 = 3.5

 

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Find the hieght of table with Cat and tortoise

June 10, 2019 by Ram Gyan Leave a Comment

Let’s see if you can solve this one.
What is the heigh of the table in cm?

height of the table, cat and tortoise


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Click here to See Solution
let’s assume height of the table is T and cat is C and R of tortoise.

let’s write down the equations

T + C – R = 170cm

T + R – C =  130cm

add both the equations

2T + C – R + R -C = 170 + 130 cm

2T = 300cm

T = 150cm

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Find the Pin

April 22, 2019 by nitin singh Leave a Comment

 

Five Clues

  1. 7 2 5: 1 number is correct and placed in the wrong spot
  2. 3 1 7: 2 numbers are correct and placed in the wrong spot
  3. 7 9 3: 1 number is correct and placed in the proper spot
  4. 8 4 9: nothing is correct.
  5. 8 9 1: 1 number is correct and placed in the wrong spot.

Check your answer:-

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Answer With ExplanationHide

from clue 3 and 4 -> 1 number can be 7 OR 3 (since 9 is not correct). Now if 7 was correct and placed in proper spot, it conflicts with Clue 1, thus 7 can’t be the correct number and the correct number is 3 and placed at proper spot (which is 3rd spot).

Now from 2nd clue -> two numbers are correct, one is 3 and other one should be 1 (as we know 7 can’t be correct number), since 1 is placed at wrong spot, correct spot for 1 should be first (since 3rd spot is for 3).

Again from Clue 1: 1 number is correct and placed at wrong spot. we are looking for a number at 2nd spot, it should be 5 (as 7 is not in picture and it can’t be 2 since it is placed at 2nd spot), 5 is placed at wrong spot, its correct spot should be 2nd, since we already know 1st and 3rd spot numbers.

Thus the PIN is 153.

 

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GPS and Battery Puzzle

April 8, 2019 by Paul Bevan 3 Comments

You have a GPS that takes 2 working batteries. You have 8 batteries but only 4 of them work.
What is the fewest number of pairs you need to test to guarantee you can get the GPS on.

[Read more…]

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Find opposites in jumbled words 1. Wtetsaes2. Mligtlsana

March 25, 2019 by Deepthi Rao Polsani Leave a Comment

Find the opposites in each word ! They are jumbled up

1. Wtetsaes
2. Mligtlsana
3. Cennmiae
4. Gteylptry
5. Togsonlhr
6. Pogathttrerea
7. Alcefsor
8. Dbmstrmau
9. Frgsdueeosnaa
10. Oubginfrn

Ex: Tinuo – In and Out

[Read more…]

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Can you do it with in 2 minutes

October 28, 2018 by dmm sai Leave a Comment

Number Puzzle #184

Check your answer:-

Tried enough already?
Answer With ExplanationHide
it follows this equation
((second digit -1 )*2 + first digit)*12
ex.
4,3 => ((3-1)x2 + 4)x12 => (4+4)x12 => 96
thus
7,3 => ((3-1)×2 + 7)x12 = 11*12= 132

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A lady, Book and a counter man

October 26, 2018 by Nixon T Leave a Comment

A woman goes to the counter and puts a book before the man there. The man says that the price is 13. The lady pays the money and goes away without taking the book. The man saw it and did not call the lady. Why?
[Read more…]

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