Simplification (Railway Maths) (651 to 700)Total Questions: 5031. If x/ √128 = √162 / x, then find the value of 'x'. [RRB JE 23/05/2019 (Evening) ](a) 12(b) 14(c) 13(d) 144Correct Answer: (a) 12Solution:32. Simplify: [RRB JE 23/05/2019 (Evening)]8 ÷ [(9 − 5) ÷ {(7 − 2) ÷ (3 + 9 ÷ 24)}](a) 80/27(b) 20/27(c) 60/27(d) 160/27Correct Answer: (a) 80/27Solution:33. If 1/7 of a number is subtracted from the number, the result is 30 less than the number. Find the number. [RRB JE 24/05/2019 (Evening)](a) 210(b) 140(c) 120(d) 105Correct Answer: (a) 210Solution:Let number be x According to the question, ⇒ x - x × 1/7 = x - 30 ⇒ 7x - x / 7 = x - 30 ⇒ 6x = 7x - 210 ⇒ x = 210 Hence the number is 210.34. Simplify [RRB JE 24/05/2019 (Evening) ](a) 2√15(b) 2√5(c) √50(d) √55Correct Answer: (a) 2√15Solution:35. Simplify: [RRB JE 28/05/2019 (Morning) ](a) 2(b) 3/10(c) 91/100(d) 101/10Correct Answer: (a) 2Solution:36. If 36³ x (4096)¹/² x 144 x 9 ÷ (9³ × 72²) = 4ˣ, find the value of 'x'. [RRB JE 28/05/2019 (Afternoon) ](a) 5(b) 7(c) 8(d) 12Correct Answer: (a) 5Solution:37. Simplify: [RRB JE 31/05/2019 (Evening) ](a) 3(b) 2(c) 1(d) 4Correct Answer: (b) 2Solution:38. Simplify: [RRB JE 31/05/2019 (Evening)][2 × (3/2) − 3 × (2/3) ] × [ 2/5 of 3/5 of 100 ](a) 24(b) 0(c) 25(d) 12Correct Answer: (a) 24Solution:[3 - 2] × [6/25 × 100] = 2439. Evaluate: [RRB JE 01/06/2019 (Morning)]45 of 3/5 ÷ 1 2/7 + 3 of 1/3 − 10(a) 10(b) 15(c) 14(d) 12Correct Answer: (d) 12Solution:40. Simplify: [RRB JE 01/06/2019 (Afternoon)]0.032 × 0.2 + 0.32 × 0.002(a) 0.00704(b) 0.0064(c) 0.00064(d) 0.0664Correct Answer: (a) 0.00704Solution:Submit Quiz« Previous12345Next »