Sasi Math (Revised for 1024)

Scroll:Real Number System >> Rational Numbers ( Exercise 1.1) >> mcq (4318)

Written Instructions:

For each Multiple Choice Question (MCQ), four options are given. One of them is the correct answer. Make your choice (1,2,3 or 4). Write your answers in the brackets provided..

For each Short Answer Question(SAQ) and Long Answer Question(LAQ), write your answers in the blanks provided.

Leave your answers in the simplest form or correct to two decimal places.

Choose the Correct answer:

The reciprocal of $\frac{-9}{15}$ is

(A) $\frac{15}{9}$ (B) $\frac{-9}{15}$ (C) $\frac{9}{15}$ (D) - $\frac{15}{9}$

1) D
2) A
3) C
4) B

( )

Choose the Correct answer:

The additive inverse of $\frac{-2}{8}$ is

(A) $\frac{8}{2}$ (B) $\frac{-2}{8}$ (C) $\frac{2}{8}$ (D) - $\frac{8}{2}$

1) B
2) C
3) A
4) D

( )

-------------- has no reciprocal.

(A) 0 (B) 7 (C) -7 (D) $\frac{1}{7}$

1) D
2) A
3) B
4) C

( )

Choose the Correct answer:

The multiplicative inverse of -2 is

(A) 2 (B) $\frac{1}{2}$ (C) -2 (D) - $\frac{1}{2}$

1) D
2) B
3) C
4) A

( )

Choose the Correct answer:

The reciprocal of $\frac{-3}{12}$ is

(A) $\frac{12}{3}$ (B) $\frac{-3}{12}$ (C) $\frac{3}{12}$ (D) - $\frac{12}{3}$

1) D
2) C
3) A
4) B

( )

Choose the Correct answer:

The additive inverse of $\frac{-2}{5}$ is

(A) $\frac{5}{2}$ (B) $\frac{-2}{5}$ (C) $\frac{2}{5}$ (D) - $\frac{5}{2}$

1) A
2) B
3) C
4) D

( )

-------------- has no reciprocal.

(A) 0 (B) 6 (C) -6 (D) $\frac{1}{6}$

1) D
2) A
3) C
4) B

( )

Choose the Correct answer:

The multiplicative inverse of -9 is

(A) 9 (B) $\frac{1}{9}$ (C) -9 (D) - $\frac{1}{9}$

1) B
2) D
3) A
4) C

( )

Choose the Correct answer:

The reciprocal of $\frac{-3}{16}$ is

(A) $\frac{16}{3}$ (B) $\frac{-3}{16}$ (C) $\frac{3}{16}$ (D) - $\frac{16}{3}$

1) A
2) D
3) B
4) C

( )

10)

Choose the Correct answer:

The additive inverse of $\frac{-3}{8}$ is

(A) $\frac{8}{3}$ (B) $\frac{-3}{8}$ (C) $\frac{3}{8}$ (D) - $\frac{8}{3}$

1) A
2) B
3) C
4) D

( )

Choose the Correct answer:

The reciprocal of $\frac{-9}{15}$ is

(A) $\frac{15}{9}$ (B) $\frac{-9}{15}$ (C) $\frac{9}{15}$ (D) - $\frac{15}{9}$

1) A
2) B
3) D
4) C

Answer: 3

SOLUTION 1 :

ans = D

The reciprocal of $\frac{-9}{15}$ is - $\frac{15}{9}$ ( which is equal to - $\frac{15}{9}$ )

Choose the Correct answer:

The additive inverse of $\frac{-2}{8}$ is

(A) $\frac{8}{2}$ (B) $\frac{-2}{8}$ (C) $\frac{2}{8}$ (D) - $\frac{8}{2}$

1) C
2) A
3) B
4) D

Answer: 1

SOLUTION 1 :

ans = C

The Additive inverseof $\frac{-2}{8}$ is $\frac{2}{8}$ (just change the sign)

-------------- has no reciprocal.

(A) 0 (B) 7 (C) -7 (D) $\frac{1}{7}$

1) C
2) B
3) A
4) D

Answer: 3

SOLUTION 1 :

Ans: A

Zero has no reciprocal, since the reciprocal of 0 is not determined.

Choose the Correct answer:

The multiplicative inverse of -2 is

(A) 2 (B) $\frac{1}{2}$ (C) -2 (D) - $\frac{1}{2}$

1) A
2) C
3) B
4) D

Answer: 4

SOLUTION 1 :

ans = D

Mulplicative inverse of -2 is the reciprocal of -2 = $\frac{1}{-2}$ = - $\frac{1}{2}$

Choose the Correct answer:

The reciprocal of $\frac{-3}{12}$ is

(A) $\frac{12}{3}$ (B) $\frac{-3}{12}$ (C) $\frac{3}{12}$ (D) - $\frac{12}{3}$

1) A
2) D
3) B
4) C

Answer: 2

SOLUTION 1 :

ans = D

The reciprocal of $\frac{-3}{12}$ is - $\frac{12}{3}$ ( which is equal to - $\frac{12}{3}$ )

Choose the Correct answer:

The additive inverse of $\frac{-2}{5}$ is

(A) $\frac{5}{2}$ (B) $\frac{-2}{5}$ (C) $\frac{2}{5}$ (D) - $\frac{5}{2}$

1) C
2) A
3) B
4) D

Answer: 1

SOLUTION 1 :

ans = C

The Additive inverseof $\frac{-2}{5}$ is $\frac{2}{5}$ (just change the sign)

-------------- has no reciprocal.

(A) 0 (B) 6 (C) -6 (D) $\frac{1}{6}$

1) D
2) C
3) B
4) A

Answer: 4

SOLUTION 1 :

Ans: A

Zero has no reciprocal, since the reciprocal of 0 is not determined.

Choose the Correct answer:

The multiplicative inverse of -9 is

(A) 9 (B) $\frac{1}{9}$ (C) -9 (D) - $\frac{1}{9}$

1) B
2) C
3) D
4) A

Answer: 3

SOLUTION 1 :

ans = D

Mulplicative inverse of -9 is the reciprocal of -9 = $\frac{1}{-9}$ = - $\frac{1}{9}$

Choose the Correct answer:

The reciprocal of $\frac{-3}{16}$ is

(A) $\frac{16}{3}$ (B) $\frac{-3}{16}$ (C) $\frac{3}{16}$ (D) - $\frac{16}{3}$

1) D
2) A
3) C
4) B

Answer: 1

SOLUTION 1 :

ans = D

The reciprocal of $\frac{-3}{16}$ is - $\frac{16}{3}$ ( which is equal to - $\frac{16}{3}$ )

10)

Choose the Correct answer:

The additive inverse of $\frac{-3}{8}$ is

(A) $\frac{8}{3}$ (B) $\frac{-3}{8}$ (C) $\frac{3}{8}$ (D) - $\frac{8}{3}$

1) C
2) D
3) B
4) A

Answer: 1

SOLUTION 1 :

ans = C

The Additive inverseof $\frac{-3}{8}$ is $\frac{3}{8}$ (just change the sign)