PuzzlersWorld.com

All Puzzles Solved Unsolved

Triangle Number Puzzle – Insert the missing number

by Leave a Comment

Number Puzzle #166

Can you find the missing number in the below triangle from the 4 options given in the image ?

number-puzzle-9-17-160-319-475

Check your answer:-

Tried enough already?
Answer With Explanation
Answer: 949

Explanation: Its actually simple logic, generally we think to find out the relation between the opposite sides, but here the relation is in between adjacent numbers, which is very unusual though.

9 * 2 = 18 -1 = 17

160 *2 = 320 -1 = 319

475 * 2 = 950 – 1 = 949

what next ?

by 6 Comments

Number Puzzle #163

number-puzzle-163

What next

2 , 2.5 , 3.33 , 4.25 , _ , _ ?

Check your answer:-

First Number

Tried enough already?

Second Number

Tried enough already?
Click here to See Solution
here the series is
2+1/2

3+1/3

4+1/4

thus next numbers should be

5+1/5 and 6+1/6

If 10x11x12 = 9 Number puzzle

by Leave a Comment

Number Puzzle #162
if-10x11x129
10×11×12=9
11×12×13=9
12×13×14=9
13×14×15=9
14×16×20=?

Check your answer:-

Tried enough already?
Click here to See Solution

To solve this, replace a n digit number by adding all digits, and solve, keep on repeating it until you get single digit.

10×11×12={(1+0)×(1+1)×(1+2)}^2 =6^2=36=3+6=9

11×12×13={(1+1)×(1+2)×(1+3)}^2 =24^2 =(2+4)^2=36=3+6=9

12×13×14={(1+2)×(1+3)×(1+4)}^2 =60^2 =(6+0)^2 =36 =3+6=9

13×14×15={(1+3)×(1+4)×(1+5)}^2 =120^2 =(1+2+0)^2 =9

14×16×20={(1+4)×(1+6)(2+0)}^2 =70^2 =(7+0)^2 =49 =4+9=13=1+3=4

3,5,33,?,503,1233

by 2 Comments

Number Puzzle #160
3,5,33,?,503,1233

What should be the missing number in the below sequence ??

3,5,33,?,503,1233

Check your answer:-

Tried enough already?
Click here to See Solution

Difference of the numbers are following a patter

5 -3 => 2 (1*1*1+1)
33 -5 => 28 (3*3*3+1)
next difference should be (5*5*5 +1) => 126, so 33 + 126 => 159
503 -159 => 344 (7*7*7+1)
1233 -503 => 730 (9*9*9+1)

soln by our readers in comments.

Social

privacy policy