Directions (Questions 28 to 31):- In each of the following questions, which one of the four interchanges in signs and numbers would make the given equation correct?

Q-28. Which Sign should be interchange to correct it.
6 x 4 + 2 = 16

(a) + and x, 2 and 4
(b) + and x, 2 and 6
(c) + and x, 4 and 6
(d) None of these

View Answer and Solution 

Answer : (c)
Solution :
(c) 6 x 4 + 2 = 16
On interchanging + and x and 4 and 6, we get the equation as:
4 + 6 x 2 = 16
4 + 12 = 16
16 = 16

Q-29. Which Sign should be interchange to correct it.
(3 ÷ 4) + 2 = 2

(a) + and ÷, 2 and 3
(b) + and ÷, 2 and 4
(c) + and ÷, 3 and 4
(d) No interchange, 3 and 4

View Answer and Solution 

Answer : (a)
Solution :
(a) (3 ÷ 4) + 2 = 2
On interchanging + and : and 2 and 3,.we get the equation as:
(2 + 4) ÷ 3 = 2
6 ÷ 3 = 2
2 = 2

Q-30. Which Sign should be interchange to correct it.
4 x 6 – 2 = 14

(a) x to ÷, 2 and 4
(b) – to +, 2 and 6
(c) – to +, 2 and 6
(d) x to +, 4 and 6

View Answer and Solution 

Answer : (c)
Solution :
(c) 4 x 6 - 2 =14
On changing - to + and interchanging 2 and 6, we get the equation as:
4 × 2 + 6 = 14
8 + 6 = 14
14 = 14

Q-31. Which Sign should be interchange to correct it.
(6 + 2) x 3 = 0

(a) ÷ and x, 2 and 3
(b) x to -, 2 and 6
(c) ÷ and x, 2 and 6
(d) x to -, 2 and 3

View Answer and Solution 

Answer : (d)
Solution :
(d) (6 ÷ 2) × 3 = 0
On changing × to × interchanging 2 and 3, we get the equation as:
(6 ÷ 3) - 2 = 0
2 - 2 = 0
0 = 0

Q-32. Select the correct set of symbols which will fit in the given equation 5 0 3 5 = 20.
(a) x, x, x
(b) -, +, x
(c) x, +, x
(d) +, -, x

View Answer and Solution 

Answer : (b)
Solution :
(b) 5035 = 20
5 - 0 + 3 x 5 = 20,
5 + 3 x 5 = 20
5 + 15 = 20

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Conclusion

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