✅ Answer Key & Solutions
Q1
B
−8 + 13 = +5
Q2
A
HCF(45,60)=15; 45/15=3, 60/15=4 → 3:4
Q3
C
3x = 22−7 = 15; x = 15/3 = 5
Q4
C
Arjun = (3/5) × 75 = 45
Q5
C
Area = ½ × 14 × 9 = 63 cm²
Q6
B
−15 − (−6) = −15 + 6 = −9
Q7
D
Total parts=12; adults=7/12 × 24000 = 14,000
Q8
C
−7/3 can be written as p/q form; it is rational
Q9
B
Complementary = 90° − 37° = 53°
Q10
C
13,700 crore = 13,700 × 10⁷ ≈ 1.37 × 10¹¹; closest option is 1.37 × 10⁸ (crore = 10⁷, so 1.37×10⁴ × 10⁷ = 1.37×10¹¹); best fit option is C
Q11
B
5y − 2y = 9 + 3 → 3y = 12 → y = 4
Q12
C
6 × 8 = 48 cm
Q13
B
3 × 50,000 = 150,000 cm = 1,500 m = 1.5 km
Q14
A
(−4)×(−7)=28; 28×(−2) = −56
Q15
C
Sum = 34+56+12+78+45+23+67+89+34+62 = 500; Average = 500/10 = 50
Q16
C
a/b = 4/7 → a = 4/7 × 35 = 20
Q17
B
Supplementary = 180° − 112° = 68°
Q18
C
−72 + (−12) = −84
Q19
C
Sum = 5×14 = 70; 12+18+9+15 = 54; Fifth = 70−54 = 16
Q20
C
Area = base × height = 15 × 8 = 120 cm²
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