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(x24 + 1)/x12 = 7 ⇒ x24/x12 + 1/x12 = 7 ⇒ x12 + 1/x12 = 7 ∴ (x72 + 1)/x36 = x72/x36 + 1/x36 = x36 + 1/x36 = (x12 + 1/x12 )3 – 3 × x12 × 1/x12 (x12 + 1/x12) ∵ (a + b)³ = a³ + b³ + 3ab (a + b) = 7³ - 3 × 7 = 343 – 21 = 322
Which numbers should be interchanged to make the given equation correct?
105 ÷ 3 – 44 + 5 × 8 = 39
Rearrange the jumbled letters to make a meaningful English word and then select the word which is different from the rest.
Select a suitable figure from the four alternatives that would complete the figure matrix.
