1.

The given operators convey new meaning. Read the meanings / instructions and find the answer.1. If ‘×’ means ‘+’, ‘÷’ means ‘– ‘, ‘– ‘ means ‘×’ and ‘+’ means ‘÷’ then: 8 × 7 – 8 + 40 ÷ 2 = (A) 48 (B) 68 (C) \(7\frac25\)(D) 72. If ‘–’ means ‘÷’, ‘+’ means ‘× ‘, ‘÷ ‘ means ‘–’ and ‘×’ means ‘+’ then which of the following is correct? (A) 52 ÷ 4 + 5 × 8 – 2 = 36 (B) 43 × 7 ÷ 5 + 4 – 8 = 25 (C) 36 × 4 – 12 + 5 ÷ 3 = 420 (D) 36 – 12 × 6 ÷ 3 + 4 = 603. The following relation became incorrect due to the interchange of two signs. Which of the two signs when interchanged makes the relation correct? 7 ÷ 8 × 2 – 16 + 2 = 15 (A) + and - (B) + and ÷ (C) + and × (D) ÷ and ×4. If the interchanges are made in signs and numbers, which of the following would be correct? Interchanges in signs : + and × Interchanges in numbers : 4 and 5 (A) 5 × 4 + 20 = 40 (B) 4 × 5 + 20 – 10 = 95 (C) 5 × 4 + 20 = 104 (D) 5 × 4 + 20 = 755. If 5*7 = 74 and 2*8 = 68, then 7*8 is: (A) 56 (B) 113 (C) 103 (D) 1236. If 17 + 22 = 12 and 26 + 19 = 18, then (10 + 20) + (12 + 2) is: (A) 44 (B) 16 (C) 24 (D) 8

Answer»

1. (C) \(7\frac25\)

8 + 7 x 8 \(\div\) 40 - 2 

BODMAS Rule

8 + \(\frac75\) - 2

= \(7\frac25\)

2. (A) 52 ÷ 4 + 5 × 8 – 2 = 36

52 + 4 x 5 + 8 \(\div\) 2 = 36 

52 - 20 + 4 = 36 

36 = 36

3. (B) + and ÷

7 + 8 x 2 - 16 \(\div\) 2 = 15 

7 + 16 - 8 = 15 

15 - 15

4. (C) 5 × 4 + 20 = 104

5 x 4 + 20 = 104 

4 + 5 x 20 =104 

4 + 100 = 104 

104 = 104

5. (B) 113

5 x 7 = 74 

52 + 72 = 74 

25 + 49 = 74 

7 x 8 = 

49 + 64 = 113

6. (D) 8

17 + 22 = 12 

(1 + 7) (2 + 2) = 12 

8 + 4 = 12 

26 + 19 = 18 

(2 + 6) + (1 + 9) = 18 

8 + 10 = 18 

(10 + 20) + (12 + 2) 

(1 + 0) + (2 + 0) + (1 + 2) + (2) 

(1 + 2) + (3 + 2) 

3 + 5 = 8


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