91.

 56 x 11 = 9, 37 x 13 = 6, 42 x 12 = 3, then find the value of 87 x 77.

• 1

• 2

• 3

• 4

If D stands for x, S stands for +, A stands for - and M stands for ÷, what is the value of the given expression

• 558

• 3312

• 137

• 31

If 3 * 4 = 10, 5 * 8 = 18, 7 * 7 = ?

• 26

• 21

• 28

• 49

Complete the third equation on the basis of a certain system followed in the first two equations.

5*4*2*1 = 1425
7*8*1*6 = 6817
9*3*7*5 =?

• 3795

• 5397

• 5973

• 5379

If'-' stands for division,'+' for multiplication, '÷' for subtraction and 'x' for addition, which one of the following equations is correct?

• 18 ÷ 3 x 2 + 8 - 6 = 10

• 18 - 3 + 2 x 8 ÷ 6 = 14

• 18 - 3 ÷ 2 x 8 + 6 = 17

• 18 x 3 + 2 ÷ 8 - 6 =15

In a certain code language, '+' represents 'x' '−' represents '+', 'x' represents '÷', and '÷' represents '−'. What is the answer to the following question?

15 - 5 + 25 ÷ 10 = ?

• 22

• -4

• 17

• 130

If 23@5 = 56;   6@7 = 26;  5@2 = 14; then what is the value of 7@5 = ?

• 26

• 24

• 19

• 52

In the following question, by using which mathematical operators will the expression become correct?

27 ? 9 ? 18 ? 24  ? 12

• ÷, +, = and +

• ÷, x, < and +

• ÷, x  > and +

• +, ÷, = and ÷

If 19  + 2 x 2 + 3 = 369  and 23 + 2 x 6 + 2  = 565, then 7 + 3 x 11 + 3 = ?

• 1674

• 1382

• 1268

• 1496

In the following question, correct the equation by interchanging two signs.

4 x 3 – 6 ÷ 2 + 7 = 8

• – and +

• x and –

• ÷ and x

• x and +