CBSE Class 8 Maths Playing with Numbers Quiz 1

1. The generalised form of the number 52 is

A

10 × 5 + 2

B

100 × 5 + 2

C

10 × 2 + 5

D

10 × 5

2. The generalised form of the number 33 is

A

10 × 3 + 3

B

10 × 3

C

3 + 3

D

3 × 3 + 3

3. The number 10 × 7 + 5 in usual form is

A

57

B

75

C

55

D

77

4. The number 10 × 2 + 7 in usual form is

A

72

B

22

C

77

D

21

5. The generalised form of the number 123 is

A

1 × 100 + 2 × 10 + 3

B

2 × 100 + 3 × 10 + 1

C

3 × 100 + 1 × 10 + 2

D

none of these

6. The generalised form of the number 234 is

A

2 × 100 + 3 × 10 + 4

B

3 × 100 + 4 × 10 + 2

C

4 × 100 + 2 × 10 + 3

D

none of these

7. The number 3 × 100 + 4 × 10 + 5 in usual form is

A

453

B

435

C

354

D

345

8. The number 5 × 100 + 7 × 10 + 9 in usual form is

A

795

B

759

C

579

D

597

9. The number 100 × a + 10 × 6 + c in usual form is

A

abc

B

bca

C

cab

D

none of these

10. The number 100 × b + 10 × c + a in usual form is

A

bac

B

bca

C

cab

D

cba