33 thoughts on “Can you figure it out?”

  1. It’s 15.
    5 + (1 x 10) = 15

    In the third line, it’s a tire plus two shock absorbers plus two shock absorbers; so, one shock absorber equals 1.

  2. The problem I have is the assumption that a single shock absorber equates to one. Just because the image of two shocks equals 2 doesn’t necessarily mean that the single is 1. So basically the last line is an algebraic expression: 5+X*10 = Z

    • I’m with you on this one. The middle image in the last line is undefined. There is no solution.

  3. This is so easy. the answer is 17.

    Proof:
    #1 3P=30, P=10
    #2 P+2T=20, 10+2T=20, 10-10+2T=20-10, 2T=10, T=5
    #3 T+2S = 9, 5+2S=9, 5-5+2S=9-5, 2S=4, S=2
    #4 T+S+P=X, 5+2+10=X, 17=X

  4. Doh! I didn’t notice the different operand on #4.
    the answer is 25.

    Proof:
    #1 3P=30, P=10
    #2 P+2T=20, 10+2T=20, 10-10+2T=20-10, 2T=10, T=5
    #3 T+2S = 9, 5+2S=9, 5-5+2S=9-5, 2S=4, S=2
    #4 T+S x P=X, T+(SxP)=X, 5+(2×10)=X, 5+20=X, 25=X

    The key is the order of operations on step 4. Many people forget that.

    • Ron – the key issue is that while S = 2, half of S = 1
      In line #3, there are 2 of S, but in line 4, there is only 1
      Therefore, #4: T + 1/2S x P = X T+(1/2SxP)=X T+(1/2 2 x 10) = X
      5+(1×10)=X 5+10= 15

  5. The order of operations is remembered by the Acronym PEMDAS.

    P –> Parentheses first
    E –> Exponents (ie Powers and Square Roots, etc.)
    MD –> Multiplication and Division (left-to-right)
    AS –> Addition and Subtraction (left-to-right)

    If you remember Algebra you know this.

    So the operations are performed as follows.
    1X10 = 10+5 = 15

  6. You can’t assume that a single shock absorber is 1. Two shock absorbers together equals 2 so it is also possible, in fact maybe even likely, that one shock absorber is the square root of two if we assume that two symbols next to each other with no operation sign separating them means they are multiplied as in 2x = 2 times x. If one shock absorber is x, and absorber absorber is xx = 2 then x = square root of 2 = 1.4142 etc

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