Think of a number

Algebra Level 1

Think of any whole number from 1 to 1000 and name it X. Add 5. Subtract 3. Subtract X. You got:

3 2 There is more than one correct answer 6

B D by B D , 16, Bulgaria

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3 solutions

B D
Mar 6, 2020

Let the number you thought is x.

x + 5 − 3 − x = x+5-3-x=

= x − x + 5 − 3 = =x-x+5-3=

= x − x + 2 = =x-x+2=

= 2 =2

Problem solved!

1 Helpful 0 Interesting 1 Brilliant 0 Confused
Lâm Lê
May 7, 2020

First and fourth steps cancel out then five minus three equals two

0 Helpful 0 Interesting 0 Brilliant 0 Confused

x + 5 − 3 − x = x + 2 − x = x − x + 2 = 2 x+5-3-\quad x\\ =\quad x+2-x\\ =\quad x-x+2\\ =\quad 2

0 Helpful 0 Interesting 0 Brilliant 0 Confused

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