Think logically not mathematically[part-9]

Level 1

if 5 5 × 2 = 20 \frac{5}{5}\times2=20 2 2 × 5 = 20 \frac{2}{2}\times5=20 9 1 × 3 = 30 \frac{9}{1}\times3=30 then 10 10 × 2 = ? \frac{10}{10}\times2=?

40 20 18 30

Sudoku Subbu by sudoku subbu , 19, India

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3 solutions

. .
Mar 26, 2021

The formula for this problem is a b × c = ( a + b ) × c \displaystyle \frac { a } { b } \times c = ( a + b ) \times c .

Then, 5 5 × 2 = 10 × 2 = 20 \displaystyle \frac { 5 } { 5 } \times 2 = 10 \times 2 = 20 (True).

2 2 × 5 = 4 × 5 = 20 \displaystyle \frac { 2 } { 2 } \times 5 = 4 \times 5 = 20 (True).

9 1 × 3 = 10 × 3 = 30 \displaystyle \frac { 9 } { 1 } \times 3 = 10 \times 3 = 30 (True).

Then, 10 10 × 2 = 20 × 2 = 40 \displaystyle \frac { 10 } { 10 } \times 2 = 20 \times 2 = \boxed { 40 } .

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Add Numerator and Denominator of fraction and Multiply by the number given.
→ ( 10 + 10 ) × 2 = 20 × 2 = 40. (10+10)×2=20×2=40.

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thats not thinking logically, its thinking creative. To think logically is to follow the rules, here you have to change them and give them a new meaning.

Dean Marinov - 1 year ago
Vishal S
Feb 8, 2015

Nice thinking.I like this question.

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i am so sorry! sir?!

subramanyam ravichandran - 6 years, 3 months ago

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