ECAT Pre Engineering MCQ Test With Answer for Chapter 1 Mathematics

Name the property used in 100 + 0 = 100

• Additive inverse A
• Multiplicative inverse B
• Additive identity C
• Multiplicative identity D

6 is

• A prime integar A
• An irrational number B
• A rational number C
• An odd integer D

√25 is a number

• Rational A
• Irrational B
• Natural C
• Odd D

What is the conjugate of -6 -i

• -6 +i A
• 6 + i B
• -6 -i C
• 6 -i D

• 
  A
• 
  B
• 
  C
• 
  D

• Principle of equality of Fractions A
• Rule for product of fraction B
• Golden rule of fraction C
• Rule of quotient of Fraction D

• 15 A
• 15 i B
• -15 i C
• -15 D

• 
  A
• 
  B
• 
  C
• 
  D

If in a set of real no a is additive identity then

• a+a = 2a A
• a+a = 1 B
• a+a = 0 C
• None of these D

• (a + b)c = a . c + bc A
• a + b = b + a B
• (a + b) + c = a + (b + c) C
• a(b+ c) = ab + ac D

(a,0) x (c,0) =

• (0,ac) A
• (ac,0) B
• (0,0) C
• (a,c) D

2.333....is a

• Irrational no A
• Complex no B
• Rational no C
• None of these D

Any recurring decimal represents a

• Irrational no A
• Integer B
• Rational no C
• None of these D

• Principle of equality of fractions A
• Rule for product of fractions B
• Golden rule for fractions C
• Rule for quotient of fractions D

• 
  A
• 
  B
• 
  C
• None of these D

Name the property used in 4 x (5 x 8) = ( 4 x 5) x 8

• Associative property of addition A
• Associative property of multiplication B
• Additive identity C
• Multiplicative identity D

• 
  A
• 
  B
• 
  C
• 
  D

The additive inverse of 2/3 is

• 3/2 A
• -2/3 B
• -3/2 C
• 0 D

The additive inverse of 0 is

• 1 A
• -1 B
• 0 C
• Does not exist D

a.a^-1 = a^-1.a = 1 is a

• Commutative law of multiplication A
• Multiplicative identity B
• Associative law of multiplication C
• Multiplicative inverse D

The additive identity of real number is

• 1 A
• 2 B
• 1/2 C
• 0 D

The multiplicative inverse ofx^(-1) is

• x A
• a-2 B
• 0 C
• 1 D

• A natural number A
• A rational number B
• An irrational number C
• A whole number D

0.25 is ______

• An irrational number A
• A natural number B
• A prime number C
• A rational number D

The additive inverse of 1 is

• 1 A
• -1 B
• 0 C
• Does not exist D

• are real no A
• both are not real B
• are imaginary no C
• both are imaginary D

(√3+√5)+√7 = √3 +(√5 +√7) property used in above is

• Commutative property of addition A
• Closure property of addition B
• Additive inverse C
• Associative property w.r.t to adition D

• (x, y) A
• (kx, y) B
• (x, ky) C
• (kx, ky) D

Additive inverse of - a - b is

• a A
• -a + b B
• a - b C
• a + b D

What is the conjugate of -6 -i?

• -6 +i A
• 6+i B
• -6 -i C
• 6 -i D