**Mathematics Mcqs Online Test 10 Preparation Question Answer**

```
Nature of the roots depends on the value of b² - 4ac is known as?
discriminant square
```

root quadratic

formula completing

square method

### Correct!

### Wrong!

If the sum of two matrices A and B is zero matrix, then A and B are said to be?/

multiplicative inverse of each other

additive inverse of each other

transpose of each other

determinant of each other

### Correct!

### Wrong!

Two lines that make an angle are called?

scalene

rays

segment

vertex

### Correct!

### Wrong!

If A, B and C matrices are of same order and (A + B) + C = A + (B + C), this law is known as?

cramer's law

distributive law

commutative law

associative law

### Correct!

### Wrong!

Vertical angles that are opposite to each other are also?

not equal

opposite

scalene

equal

### Correct!

### Wrong!

We can subtract two matrices A and B if their?

elements are same

order is same

rows are same

columns are same

### Correct!

### Wrong!

If A and B matrices are of same order and A + B = B + A, this law is known as?

distributive law

commutative law

associative law

cramer's law

### Correct!

### Wrong!

We can add two matrices having real numbers A and B if their?

order is same

rows are same

columns are same

elements are same

### Correct!

### Wrong!

Sum of all angles around a main point equals to?

360°

180°

270°

90°

### Correct!

### Wrong!

Angles that are opposite to each other are called?

vertical angles complementary

angles reflective

angles supplementary

angles

### Correct!

### Wrong!

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