Simplification (Railway Maths) (101 to 150)

Total Questions: 50

21. The value of 1/4 + 2/5 ÷ [{2 1/5 − 2} × 5] − 2/3 × 3/5 is: [Group D 29/08/2022 (Morning)]

Correct Answer: (c) 1/4
Solution:

22. The fraction equivalent to 0.4363636...... is:

Correct Answer: (a) 24/55
Solution:

23. Subtract the sum of 2x − 3y + 7z and 4z − 5x from 12x − z. [Group D 29/08/2022 (Morning)]

Correct Answer: (a) 15x + 3y − 12z
Solution:

24. Find the value of √9604. [Group D 29/08/2022 (Afternoon)]

Correct Answer: (b) 98
Solution:

√9604 = √(2 × 2 × 7 × 7 × 7 × 7)
= 2 × 7 × 7
= 98

25. The value of 3/7 + 2/7 + 1/14 + 2/7 - 3? [Group D 29/08/2022 (Afternoon) ]

Correct Answer: (b) -27/14
Solution:

26. The value of 0.2 × 0.2 × 0.2 − 0.02 × 0.02 × 0.02/ 2 × 2 × 2 = ? [Group D 29/08/2022 (Afternoon) ]

Correct Answer: (b) 0.000999
Solution:

27. Simplify x(2x - 5) + 6(x² - 4) + 18? [Group D 29/08/2022 (Afternoon) ]

Correct Answer: (d) 8x² − 5x − 6
Solution:

x(2x - 5) + 6(x² - 4) + 18
= 2x² - 5x + 6x² - 24 + 18
= 8x² - 5x - 6

28. Simplify: 9991 × 10009? [Group D 29/08/2022 (Afternoon)]

Correct Answer: (c) 99,999,919
Solution:

9991 × 10009
= (10000 − 9) × (10000 + 9)
= 100000000 − 81
= 99,999,919

29. Simplify 2(3/2 x² − 24x + 12) − 3(x² + 4x − 13)? [Group D 29/08/2022 (Evening)]

Correct Answer: (a) −60x + 63
Solution:

30. Which of the following options is the closest approximate value which will come in place of the question mark (?) in the following equation?

(√142 + 52 ÷ 26 × 5 − √80) × 2 = ?

Correct Answer: (c) 26
Solution: