SOLVE AND CHOOSE THE CORRECT ANSWER :- 21. Tell which of the following is a linear equation in one variable :-
(i). 2 − 4 + 3 = 0
(ii). 6 − 2√ = 7
(iii). 3 − 1 = −2
(iv). 3 + 2 = 4( + 7) + 9
(a) (i), (ii) (b) (i), (iii) (c) (ii), (iv) (d) (iii), (iv)
22. The solution of 2x - 3 = 7 is :-
(a) 5 (b) 7 (c) 12 (d) 11
23. What should be added to -7/3 to get 3/7?
(a) 21/58
(b) 58/21
(c) 47/21
(d) 50/21
24. The perimeter of rectangle is 20cm. If the length of rectangle is 6cm, then its breadth will be :-
(a) 4 cm
(b) 6 cm
(c) 10 cm
(d) 14 cm
25. The age of father is three times the age of son. If the age of son is 15 years old, then the age of father is :-
(a) 50 years
(b) 55 years
(c) 40 years
(d) 45 years
26. The difference between two whole numbers is 66. The ratio of the two numbers is 2 : 5. The two numbers are :-
(a) 60 and 6
(b) 100 and 33
(c) 110 and 44
(d) 99 and 33
27. Three consecutive integers add up to 51. The integers are :-
(a) 16,17,18
(b) 15,16,17
(c) 17,18,19
(d) 18,19,20
28. The solution for 3m = 5m – (8/5) is :-
(a) 8/5
(b) 4/5
(c) 5/4
(d) 4/3
29. The solution of 2x - 3 = x + 2 is :-
(a) 9
(b) 12
(c) 3
(d) 5
30. What should be the equation, If 3 is subtracted from 2 times x is 7 :-
(a) x - 7 = 3
(b) 2x + 7 = 3
(c) 2x - 3 = 7
(d) x - 2 = 7
(i). 2 − 4 + 3 = 0
(ii). 6 − 2√ = 7
(iii). 3 − 1 = −2
(iv). 3 + 2 = 4( + 7) + 9
(a) (i), (ii) (b) (i), (iii) (c) (ii), (iv) (d) (iii), (iv)
22. The solution of 2x - 3 = 7 is :-
(a) 5 (b) 7 (c) 12 (d) 11
23. What should be added to -7/3 to get 3/7?
(a) 21/58
(b) 58/21
(c) 47/21
(d) 50/21
24. The perimeter of rectangle is 20cm. If the length of rectangle is 6cm, then its breadth will be :-
(a) 4 cm
(b) 6 cm
(c) 10 cm
(d) 14 cm
25. The age of father is three times the age of son. If the age of son is 15 years old, then the age of father is :-
(a) 50 years
(b) 55 years
(c) 40 years
(d) 45 years
26. The difference between two whole numbers is 66. The ratio of the two numbers is 2 : 5. The two numbers are :-
(a) 60 and 6
(b) 100 and 33
(c) 110 and 44
(d) 99 and 33
27. Three consecutive integers add up to 51. The integers are :-
(a) 16,17,18
(b) 15,16,17
(c) 17,18,19
(d) 18,19,20
28. The solution for 3m = 5m – (8/5) is :-
(a) 8/5
(b) 4/5
(c) 5/4
(d) 4/3
29. The solution of 2x - 3 = x + 2 is :-
(a) 9
(b) 12
(c) 3
(d) 5
30. What should be the equation, If 3 is subtracted from 2 times x is 7 :-
(a) x - 7 = 3
(b) 2x + 7 = 3
(c) 2x - 3 = 7
(d) x - 2 = 7
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