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1.  
45 + 72 ÷ 8 × 3 − 12 = ?

Correct Answer: C [60]

Explanation:

72 ÷ 8 = 9, 9 × 3 = 27; 45 + 27 − 12 = 60.

2.  
4/5 + 2/3 − 7/10 = ?

Correct Answer: A [23/30]

Explanation:

LCM 30: (24 + 20 − 21)/30 = 23/30.

3.  
Fill in the blank: 0.(6) = 0.666… = ____

Correct Answer: B [2/3]

Explanation:

One repeating digit → 6/9 = 2/3.

4.  
2⁵ × 2³ ÷ 2⁶ = ?

Correct Answer: D [4]

Explanation:

Same base: 2^(5 + 3 − 6) = 2² = 4.

5.  
True or false? "√(9 + 16) = √9 + √16"

Correct Answer: B [False]

Explanation:

√25 = 5, but √9 + √16 = 3 + 4 = 7.

6.  
1.25 × 0.8 × 12 = ?

Correct Answer: A [12]

Explanation:

1.25 × 0.8 = 5/4 × 4/5 = 1, so the answer is 12.

7.  
Odd one out – which is NOT equal to 0.75?

Correct Answer: B [7/5]

Explanation:

7/5 = 1.4; the others all equal 0.75.

8.  
? × 15 = 225 + 3.5 × 30. Find ?

Correct Answer: C [22]

Explanation:

225 + 105 = 330; 330 ÷ 15 = 22.

9.  
81^(1/4) × 8^(1/3) = ?

Correct Answer: D [6]

Explanation:

⁴√81 = 3, ∛8 = 2 → 6.

10.  
Match: (i) 0.(3) (ii) 0.1(6) (iii) 0.(09) (iv) 0.(142857) ; (p) 1/11 (q) 1/3 (r) 1/7 (s) 1/6

Correct Answer: B [i-q, ii-s, iii-p, iv-r]

Explanation:

3/9 = 1/3; (16 − 1)/90 = 1/6; 9/99 = 1/11; 142857/999999 = 1/7.

11.  
19.98 × 15.03 ≈ ?

Correct Answer: C [300]

Explanation:

≈ 20 × 15 = 300 (one rounded up, one down – balanced).

12.  
43 × 57 + 43 × 43 = ?

Correct Answer: A [4,300]

Explanation:

Common factor: 43 × (57 + 43) = 43 × 100 = 4,300.

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