| Basic Mathematics MCQs | Series MCQs |
| Basic Mathematics | Algebra |
| Calculation | Angles |
A. 20° , 70° , 90°
B. 20° , 70° , 110°
C. 18° , 63° , 99°
D. 23° , 54° , 110°
Explanation: Sum of angles in a triangle = 180°. Sum of ratios = 20. First angle = 2 × 180 / 20 = 18°. Second angle = 7 × 180 / 20 = 63°. Third angle = 11 × 180 / 20 = 99°.