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

• 20 - 4 + 6 ÷ 9 x 4 = 25

• 20 + 6 - 4 x 9 ÷ 6 = 32

• 20 ÷ 9 x 9 - 4 + 6 = 33

• 20 x 4 - 6 - 4 + 9 = 20

If P denotes ÷, Q denotes x, R denotes + and S denotes - then what is the value of 18Q12P4R5S6

• 64 

• 53

• 81

• 24

If 4 + 3 = 25, and 8 + 4 = 80, then, 3 + 2 = ?

• 15

• 10

• 13

• 12

Some equations are solved on the basis of the certain system. Find out the correct answer for the unsolved equation on that basis:

4 x 5 x 8 = 584, 7 x 3 x 9 = 397, 9 x 7 x 3 = ?

• 397

• 793

• 973

• 739

- means ÷, + means x, ÷ means-, x means +, then which of the following equations is correct?

• 43 x 7 ÷ 5 + 4 - 8 = 25

• 48 ÷ 5 + 8 x 10 - 2 = 13

• 36 x 4 - 12 + 5 ÷ 3 = 420

• 42 + 5 ÷ 6 x 8 - 3 = 28

If 'A' stands for '+' , 'B' stands for '-' , 'C' stands for 'x' , what is the value of (10C4)A(4C4)B6 = ?

• 46

• 50

• 56

• 60

87.

If 324 ⊕ 289 = 35, 441 ⊕ 484 = 43, then 625 ⊕ 400 = ?

• 45

• 50

• 55

• 40

If 24x2=84, and 32x3=69, then 13x3=?

• 38

• 93

• 18

• 16

If + means division, - means multiplication, '÷' means subtraction, x means addition, and < means less than, then which of the following is false.

• (10+2)÷7 < (10÷7)+2

• (10-7)x2 < (10x2)-7

• (10x7)-2 < (10-2)x7

• (10÷2)+7 < (10+7)x2

If 5 x 4 x 0 = 405
3 x 2 x 8 = 283
then 1 x 7 x 6 = ?

• 617

• 716

• 167

• 761