Number Puzzle - Involving Triangles
Number Puzzle - Involving Triangles
Number Puzzle : Problems involving Triangles:
Various Types of Relationships
(i) n (a + b + c) = d, where n is a number
(ii)
(iii)
(iv)
(v)
Example : Find the missing number:
A. 34 B. 27 C. 28 D. 29
Answer : 29
Explanation : The product of the two largest numbers minus the square of the smallest. It can be explained as :
Triangle 1 : Product of Two Largest numbers = 7 X 5 = 35
Square of third smalled number = . So answer will be 35 - 9 = 26.
Applying this rule in the forth triangle : Product of largest two numbers = 5 X 9 = 45. Subtracting the square of smallest third number = 16
, So the missing number is 45 -16 = 29
Example : Find the missing number
A. 9 B. 10 C. 11 D. 12
Answer : 9
Explanation : In each triangle, multiply the lower two numbers together and add the upper number to give the value in the centre.
In triangle 1 : Multiply lower two numbers (numbers at the base) = 6 X 2 = 12
Add the third number = 12 + 7 = 19
Similarly in triangle 3 : Multiply lower two numbers = 2 x y (let the unknown be y)
Add the third number = 2y + 5 = 23
Subtracting 5 from both sides : 2y + 5 - 5 = 23 - 5
2y = 18
y = 9. Hence answer is 9.
Directions : Find the missing character in each of the following.
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| Right Option : A | |||
| View Explanation | |||
Directions : Find the missing character in the following :
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| Right Option : D | |||
| View Explanation | |||
Which number replaces the question mark (?)
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| Right Option : D | |||
| View Explanation | |||
Students / Parents Reviews [20]
We started with lot of hope that Abhyas will help in better understnding of complex topics of highers classes. we are not disappointed with the progress our child has made after attending Abhyas. Though need to mention that we expected a lot more. On a scale of 1-10, we would give may be 7.
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