Mathematical operation and symbol notation
 Select the correct combination of mathematical signs to replace * signs and to balance the given equation.
5 * 6 * 5 * 8 * 14

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5 x 6 ÷ 5 + 8 = 14
Correct Option: B
5 x 6 ÷ 5 + 8 = 14
 If + = x ,  = ÷ , x = + , ÷ =  , then which is the correct equation out of the following ?

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18 + 6  4 x 2 ÷ 3 = 26
After chaning, the equation is
L.H.S., 18 x 6 ÷ 4 + 2  3
108 ÷ 4 + 2  3
27 + 2  3
29  3 = 26 R.H.S.Correct Option: B
18 + 6  4 x 2 ÷ 3 = 26
After chaning, the equation is
L.H.S., 18 x 6 ÷ 4 + 2  3
108 ÷ 4 + 2  3
27 + 2  3
29  3 = 26 R.H.S.
 If + means ÷,  means x, x mean +, ÷ means , then
90 + 18  6 x 30 ÷ 4 = ?

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65
Correct Option: B
65
Direction: In each of the following questions, all the equations except one have been solved according to a certain rule. You are required to solve the unsolved equation following the same rule and to choose the correct answer out of the given options.
 9 * 7 = 32, 13 * 7 = 120, 17 * 9 = 208, 19 * 11 = ?

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As, 9 * 7 ⇒ (9 + 7) (9  7) = 16 x2 = 32
13 * 7 ⇒ (13 + 7) (13  7) = 20 x 6 = 120
17 * 9 ⇒ (17 + 9) (17  9) = 26 x 8 = 208Correct Option: C
As, 9 * 7 ⇒ (9 + 7) (9  7) = 16 x2 = 32
13 * 7 ⇒ (13 + 7) (13  7) = 20 x 6 = 120
17 * 9 ⇒ (17 + 9) (17  9) = 26 x 8 = 208
Similarly, 19 * 11 ⇒ (19 + 11) (19  11) = 30 x 8 = 240
∴ ? = 240
 4  4 = 12, 6  6 = 30, 2  2 = 2, 8  8 = ?

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As, 4  4 ⇒ 4 x 4  4 = 12
6  6 ⇒ 6 x 6  6 = 30
2  2 ⇒ 2 x 2  2 = 2Correct Option: C
As, 4  4 ⇒ 4 x 4  4 = 12
6  6 ⇒ 6 x 6  6 = 30
2  2 ⇒ 2 x 2  2 = 2
Similarly, 8  8 ⇒ 8 x 8  8 = 56