The product of two numbers is -20/9 and one of the numbers is 4 then the other number is ………………… 

Correct Answer - (a) 0 और 1;1 `" "` (b) 5 और 6;5 (c ) 2 और 3;3 `" "` (d) 6 और 7;6 (e) 9.0 स्वयं 9 पूर्ण संख्या...

I thought F or H = 80 is giving by n(F u H) = n(F) + n(H) - n(F n H)

Correct option is (D) -5/9 Let the other numbr be x. Then \(x\times4=-\frac{20}9\) \(\Rightarrow\) \(x=\frac{-20}{9\times4}\) \(=\frac{-5}{9}.\)

Correct option is (D) 35/38 Let the second number be x. \(\therefore\) x + \((\frac{-8}{19})\) = \(\frac{1}{2}\) \(\Rightarrow\) x = \(\frac{1}{2}\) - \((\frac{-8}{19})\) = \(\frac{1}{2}\) + \(\frac{8}{19}\) \(=\frac{19+8\times2}{38}\) \(=\frac{19+16}{38}\) \(=\frac{35}{38}.\)

Correct option is (C) 17 The smaller number is x. \(\therefore\) other number is x+5. \((\because\) One number is 5 greater than the other) Given that sum of two numbers is 29. \(\therefore\) x + (x+5) = 29 \(\Rightarrow\) 2x...

Correct option is (D) 8 or -9 Let consecutive numbers are x and x+1. \(\therefore\) x(x+1) = 72    (Given) \(\Rightarrow\) \(x^2+x-72=0\) \(\Rightarrow\) \(x^2+9x-8x-72=0\) \(\Rightarrow\) x(x+9) - 8(x+9) = 0 \(\Rightarrow\) (x-8) (x+9) = 0 \(\Rightarrow\) x - 8 = 0 or x+9...