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Elementary Mathematics

Elementary Mathematics Topics

School level (Class 6–12) — Elementary Mathematics

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Number Systems

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quiz Questions

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Q71

If 8x + 7 = 79, find x.

1 · 2 marks · MCQ

A.

939

B.

11

C.

8

D.

9

Explanation

8x = 72 ⇒ x = 9.

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Q72

If 4x + 5 = 25, find x.

2 · 2 marks · MCQ

A.

4

B.

6

C.

7

D.

5

Explanation

4x = 20 ⇒ x = 5.

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Q73

If 3x + 21 = 45, find x.

3 · 2 marks · MCQ

A.

8

B.

7

C.

10

D.

15

Explanation

3x = 24 ⇒ x = 8.

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Q74

If 8x + 5 = 109, find x.

4 · 2 marks · MCQ

A.

12

B.

13

C.

15

D.

386

Explanation

8x = 104 ⇒ x = 13.

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Q75

If 5x + 16 = 76, find x.

5 · 2 marks · MCQ

A.

14

B.

15

C.

12

D.

11

Explanation

5x = 60 ⇒ x = 12.

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Q76

If 3x + 39 = 72, find x.

1 · 2 marks · MCQ

A.

24

B.

11

C.

13

D.

10

Explanation

3x = 33 ⇒ x = 11.

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Q77

If 9x + 11 = 38, find x.

2 · 2 marks · MCQ

A.

5

B.

3

C.

4

D.

2

Explanation

9x = 27 ⇒ x = 3.

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Q78

If 6x + 6 = 72, find x.

3 · 2 marks · MCQ

A.

12

B.

11

C.

13

D.

10

Explanation

6x = 66 ⇒ x = 11.

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Q79

If 3x + 32 = 74, find x.

4 · 2 marks · MCQ

A.

16

B.

13

C.

24

D.

14

Explanation

3x = 42 ⇒ x = 14.

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Q80

If 2x + 24 = 50, find x.

5 · 2 marks · MCQ

A.

15

B.

13

C.

12

D.

25

Explanation

2x = 26 ⇒ x = 13.