Simplification (Railway Maths) (101 to 150)

Total Questions: 50

31. 7.44 ... + 3.77 ... - 2.55 ... =? [Group D 29/08/2022 (Evening)]

Correct Answer: (a) 78/9
Solution:

32. Simplify (2.46 × 2.46 − 1.46 × 1.46) / 2.46 − 1.46, giving your answer as a fraction.

Correct Answer: (d) 392/100
Solution:

33. The value of (18 ÷ 9) × (−7 + 9) − 7 × 2 = ? [Group D 30/08/2022 (Morning)]

Correct Answer: (a) −10
Solution:

(18 ÷ 9) × (−7 + 9) − 7 × 2
= 2 × 2 − 14
= −10

34. The Value of (0.5 × 10.6 − 0.2 × 1.4) / 0.4? [Group D 30/08/2022 (Afternoon)]

Correct Answer: (b) 12.55
Solution:

(0.5 × 10.6 − 0.2 × 1.4) / 0.4
= (5.3 − 0.28) / 0.4
= 5.02 / 0.4
= 12.55

35. The value of 121.12 × 0.121 is: [Group D 30/08/2022 (Evening)]

Correct Answer: (a) 14.65552
Solution:

121.12 × 0.121 = 14.65552

36. Simplify:

x³ − 3x² + 9x − 12 − x³ − 7x² − 8x − 16

Correct Answer: (c) −10x² + x − 28
Solution:

x³ − 3x² + 9x − 12 − x³ − 7x² − 8x − 16
= −10x² + x − 28

37. The value of √1.0201 = ?

Correct Answer: (c) 1.01
Solution:

38. Simplify: [Group D 01/09/2022 (Morning)]

3(9x³ − 6x² + 30) − 9(3x³ − 2x + 30)

Correct Answer: (c) −18(x² − x + 10)
Solution:

39. The value of (−5/3) × (9/25) + (1/5 − 2) = ? [Group D 01/09/2022 (Morning)]

Correct Answer: (b) −12/5
Solution:

40. Simplify 2³ × 3² × 7? [Group D 01/09/2022 (Afternoon)]

Correct Answer: (b) 504
Solution:

2³ × 3² × 7
⇒ 8 × 9 × 7 = 504