MCQOPTIONS
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MCQOPTIONS
This section includes 497 Mcqs, each offering curated multiple-choice questions to sharpen your Grade9 knowledge and support exam preparation. Choose a topic below to get started.
| 401. |
A rectangular array or a formation of a collection of real numbers |
| A. | formula |
| B. | determinant |
| C. | matrix |
| D. | equation |
| Answer» D. equation | |
| 402. |
A diagonal matrix having same elements is called a |
| A. | square matrix |
| B. | identical matrix |
| C. | scalar matrix |
| D. | rectangular matrix |
| Answer» D. rectangular matrix | |
| 403. |
If A and B matrices are of same order and a + b = B + A, this law is known as |
| A. | distributive law |
| B. | commutative law |
| C. | associative law |
| D. | Cramer's law |
| Answer» C. associative law | |
| 404. |
A scalar matrix having each element equal to 1 is said to be |
| A. | unit or identical matrix |
| B. | rectangular matrix |
| C. | square matrix |
| D. | diagonal matrix |
| Answer» B. rectangular matrix | |
| 405. |
We can add two matrices having real numbers A and B if their |
| A. | order is same |
| B. | rows are same |
| C. | columns are same |
| D. | elements are same |
| Answer» B. rows are same | |
| 406. |
The union of set A and B is denoted by |
| A. | A+B |
| B. | A-B |
| C. | A∩B |
| D. | A∪B |
| Answer» E. | |
| 407. |
In ordered pair (y, z), ‘y’ is called |
| A. | constant |
| B. | first co-ordinate |
| C. | second co-ordinate |
| D. | co-efficient |
| Answer» C. second co-ordinate | |
| 408. |
Complement of a set B in denoted by |
| A. | B' |
| B. | B° |
| C. | {B} |
| D. | B² |
| Answer» B. B° | |
| 409. |
The set W = {0, 1, 2, 3, 4, 5, 6, 7.....} is known as |
| A. | set of odd numbers |
| B. | set of whole numbers |
| C. | set of natural numbers |
| D. | set of even numbers |
| Answer» C. set of natural numbers | |
| 410. |
If 2 sets A and B are given, then the set consisting of all the common elements of A and B, then it is called |
| A. | Intersection of A and B |
| B. | union of A and B |
| C. | Complement of A |
| D. | Complement of B |
| Answer» B. union of A and B | |
| 411. |
By changing the signs of all the elements of a matrix, we obtained |
| A. | identical matrix |
| B. | negative of a matrix |
| C. | null/zero matrix |
| D. | determinant of a matrix |
| Answer» C. null/zero matrix | |
| 412. |
In matrices, the columns are denoted by |
| A. | A |
| B. | B |
| C. | R |
| D. | C |
| Answer» E. | |
| 413. |
The theory of matrices was developed in |
| A. | 1838 |
| B. | 1858 |
| C. | 1829 |
| D. | 1847 |
| Answer» C. 1829 | |
| 414. |
In arithmetic sequence, the terms are denoted by |
| A. | an |
| B. | am |
| C. | an |
| D. | a ⁄ n |
| Answer» B. am | |
| 415. |
The three Geometric means between 2 and 32 are |
| A. | 6, 10, 14 |
| B. | 10, 12, 14 |
| C. | 6, 8, 10 |
| D. | 4, 8, 16 |
| Answer» E. | |
| 416. |
The arithmetic mean between x -1 and x + 7 is |
| A. | x + 4 |
| B. | x - 3 |
| C. | x + 3 |
| D. | x - 4 |
| Answer» D. x - 4 | |
| 417. |
To represent a sequence, a special notation is used called |
| A. | an |
| B. | am |
| C. | an |
| D. | a ⁄ n |
| Answer» B. am | |
| 418. |
The arithmetic mean between −4 and 12 is |
| A. | 5 |
| B. | −4 |
| C. | 4 |
| D. | 3 |
| Answer» D. 3 | |
| 419. |
If 2 and 4 are two arithmetic means between a and b, then the value of a and b are |
| A. | 0 and −6 |
| B. | −1 and 5 |
| C. | 1 and 3 |
| D. | 0 and 6 |
| Answer» E. | |
| 420. |
In arithmetic sequence, the numbers are called |
| A. | terms |
| B. | rate |
| C. | coefficient |
| D. | sigma |
| Answer» B. rate | |
| 421. |
The 8th term in the Arithmetic Progression −4, −7, −10, .... is |
| A. | 25 |
| B. | −25 |
| C. | 27 |
| D. | −27 |
| Answer» C. 27 | |
| 422. |
A sequence is also called |
| A. | combination |
| B. | permutation |
| C. | progression |
| D. | logarithm |
| Answer» D. logarithm | |
| 423. |
If a, A, b are in Arithmetic Progression then ‘A’ is said to be |
| A. | arithmetic mean |
| B. | geometric mean |
| C. | standard deviation |
| D. | none of above |
| Answer» B. geometric mean | |
| 424. |
If the sequence has a last term, then it is said to be |
| A. | infinite sequence |
| B. | finite sequence |
| C. | arithmetic sequence |
| D. | none of above |
| Answer» C. arithmetic sequence | |
| 425. |
In any case, the common ratio in Geometric Progression cannot be |
| A. | 2 |
| B. | 1 |
| C. | 3 |
| D. | 0 |
| Answer» E. | |
| 426. |
The general term of Geometric Progression is |
| A. | an = arn-1 |
| B. | an = arn-1 |
| C. | an = arn |
| D. | an = arn+1 |
| Answer» B. an = arn-1 | |
| 427. |
Which term of an Arithmetic Progression 6, 4, 2, 0, −2, .... is -120? |
| A. | 60 |
| B. | 62 |
| C. | 64 |
| D. | 61 |
| Answer» D. 61 | |
| 428. |
A sequence of numbers, each of which after the 1st is obtained from the preceding one by adding to it a fixed number is known as |
| A. | geometric sequence |
| B. | finite sequence |
| C. | infinite sequence |
| D. | arithmetic sequence |
| Answer» E. | |
| 429. |
The 6th term of the Geometric Progression 2, 8, 16, ... is |
| A. | 1024 |
| B. | 2048 |
| C. | 8192 |
| D. | 4096 |
| Answer» C. 8192 | |
| 430. |
In geometric sequence, the common ratio is denoted by |
| A. | d |
| B. | b |
| C. | r |
| D. | R |
| Answer» D. R | |
| 431. |
Arithmetic mean is calculated by |
| A. | (a + b)² |
| B. | (a + b) ⁄ 2 |
| C. | a × 2b |
| D. | a - b ⁄ 2 |
| Answer» C. a × 2b | |
| 432. |
If a = 8, an = 206, n = 23, then the value of ‘d’ should be |
| A. | 9 |
| B. | 10 |
| C. | 8 |
| D. | 7 |
| Answer» B. 10 | |
| 433. |
If ‘a’ is the first term of an Arithmetic Progression, then the 3rd term will be |
| A. | a³ |
| B. | a + 2d |
| C. | a + 3d |
| D. | a + 3r |
| Answer» C. a + 3d | |
| 434. |
Real part of 2ab(ι + ι²) is |
| A. | 2ab |
| B. | −2ab |
| C. | 2abι |
| D. | −2abι |
| Answer» B. −2ab | |
| 435. |
As per properties of real numbers with respect to multiplication, (ab)c = a(bc) and ∀ a, b, c ∈ R is |
| A. | closure property |
| B. | associative property |
| C. | additive inverse |
| D. | commutative property |
| Answer» C. additive inverse | |
| 436. |
The numbers which cannot be expressed as quotient of integers are known as |
| A. | irrational numbers |
| B. | rational numbers |
| C. | whole numbers |
| D. | prime numbers |
| Answer» B. rational numbers | |
| 437. |
The decimal form of 5 ⁄ 8 is |
| A. | 0.578 |
| B. | 0.625 |
| C. | 0.313 |
| D. | 1.324 |
| Answer» C. 0.313 | |
| 438. |
The numbers 1, 2, 3, .... Which are used for counting certain objects are called |
| A. | whole numbers |
| B. | natural numbers |
| C. | prime numbers |
| D. | odd numbers |
| Answer» C. prime numbers | |
| 439. |
The set of all complex numbers is denoted by |
| A. | P |
| B. | W |
| C. | N |
| D. | C |
| Answer» E. | |
| 440. |
In the exponential notation an, ‘n’ is called |
| A. | radical |
| B. | coefficient |
| C. | exponent |
| D. | base |
| Answer» D. base | |
| 441. |
The set of rational numbers is denoted by |
| A. | R |
| B. | Q |
| C. | R' |
| D. | Q' |
| Answer» C. R' | |
| 442. |
The square of a real number is |
| A. | non-negative |
| B. | negative |
| C. | rational |
| D. | irrational |
| Answer» B. negative | |
| 443. |
Imaginary part of −ι(3ι + 2) is |
| A. | −2 |
| B. | 2 |
| C. | 3 |
| D. | −3 |
| Answer» B. 2 | |
| 444. |
In a × 1 = a = 1 × a and ∀ a ∈ R then ‘1’ is called |
| A. | additive identity |
| B. | multiplicative identity |
| C. | additive inverse |
| D. | multiplicative inverse |
| Answer» C. additive inverse | |
| 445. |
Symbolically the proportion of a, b, c, d is written as |
| A. | a : b :: c : d |
| B. | a + b :: c + d |
| C. | a + b = c + d |
| D. | a - b = c - d |
| Answer» B. a + b :: c + d | |
| 446. |
Ali spends $30 everyday, but on Sunday, he spends $10 only. The ratio of amount spent on Sunday to everyday should be |
| A. | 3 : 1 |
| B. | 1 : 3 |
| C. | 3 : 5 |
| D. | 2 : 1 |
| Answer» C. 3 : 5 | |
| 447. |
The decimal form of 25 1 ⁄ 3 is |
| A. | 0.00253 |
| B. | 2.53 |
| C. | 0.253 |
| D. | 253 |
| Answer» D. 253 | |
| 448. |
The price of 20 books is $1000. The price of 45 such books should be |
| A. | 4540 |
| B. | 2250 |
| C. | 1500 |
| D. | 1750 |
| Answer» C. 1500 | |
| 449. |
If two quantities are related in such a way that when 1 quantity increases, the other quantity decreases, then this variation is said to be |
| A. | extreme proportion |
| B. | joint proportion |
| C. | direct proportion |
| D. | inverse proportion |
| Answer» E. | |
| 450. |
The numbers in the form of p ⁄ q where p, q are integers and q is not zero are called |
| A. | irrational numbers |
| B. | rational numbers |
| C. | whole numbers |
| D. | prime numbers |
| Answer» C. whole numbers | |