Let 5/6 ÷ 6/7 x N - 8/9 ÷ 8/5 + 3/4 x 10/3 = 25 / 9
Then, 5/6 x 7/6 x N - 8/9 x 5/8 + 5/2 = 25/9
? 35N / 36 = 25/9 + 5/9 - 5/2
? 35N / 36 = (50 + 10 - 45) / 18 = 5/6
? N = (5/6 x 36/35) = 6/7
Given expression = 3/4 ÷ 9/4 of 2/3 - [(1/6) / (5/6)] x 10/3 + 5/6
= 3/4 x 2/3 - 1/6 x 6/5 x 10/3 + 5/6
= 1/2 - 2/3 + 5/6
= (3 - 4 + 5) / 6
= 4 / 6
= 2 /3
Given expression = 15/2 + 1/2 ÷ 1/8 - 2/5 x 7/3 ÷ 15/8 x (7/5 - 4/3)
= 15/2 + 4 - 2/5 x 7/3 ÷ 15/8 x 1/15
= 15/2 + 4 - 2/5 x 7/3 ÷ 1/8
= 15/2 + 4 - 2/5 x 7/3 x 8/1
= 15/2 + 4 - 112/15
= 23/2 - 112/15
= 121/30
= 41/30
Given expression = 3 ÷ [(8 - 5) ÷ {(4 - 2) ÷ (2 + 8/13)}]
= 3 ÷ [3 ÷ { 2 ÷ 34/13}]
= 3 ÷ [3 ÷ { 2 x 13/34}]
= 3 ÷ [ 3 x 17/13]
= 3 x 13/51
= 13/17
Given Exp. = ( a3 + b3 ) / ( a2 - ab + b2 ), where a =3 42, b = 257
= [(a + b )(a2 - ab +b2)] / (a2 - ab + b2)
= a + b
= 343+257
= 600.
Given expression = (a3 - b3) / (a2 + ab + b2), where a=117, b =98
= [(a-b)(a2 + ab + b2)] / (a2+ab+b2)
=(a-b)
=117 - 98
= 19.
Let 47/3 x 19/6 + 19/3 = 205 / 18 + N
Then, N = 893/18 + 19/3 - 205/18
? N = 893 + 114 - 205 / 18
? N = 802 / 18 = 445/9
Given expression = 15/2 -[9/4 ÷ {5/4 - 1/2(3/2 - 1/3 - 1/6)}]
= 15/2 -[9/4 ÷ {5/4 - 1/2 x 1}]
= 15/2 -[9/4 ÷ {5/4 - 1/2}]
= 15/2 -[9/4 ÷ 3/4] = 15/2 - [9/4 x 4/3]
= (15/2 - 3)
= 9 / 2 = 41/2
Let 50 / N = N / (25/2)
? N2 = 50 x 25/2 = 625
? N = ?625 = 25
Given Exp. = 4/7 + (2y - x)/(2y + x)
= 4/7 + [(2 - (x/y)] / [2 + (x/y)]
= 4/7 + [2 - 4/5] / [2 + 4/5]
= 4/7 + ( 6/5 x 5/14 )
= 4/7 + 3/7
= 1
Given expression = 2x + y / x - 2y
Dividing Num and Denom by y we get.
= [2(x/y) + 1] / [(x/y) - 2] = (2 x 3 + 1) / (3 - 2) = 7/1 = 7
[ ? x/2y = 3 / 2 ?x/y = (3 / 2 x 2) = 3 ]
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