Answer: D) Methane Explanation: Methane is the main component of biogas and natural gas.

Answer: A) Vacuum Explanation: A Sound wave needs a medium for propogation. Hence, Sound cannot travel through a vacuum. A vacuum is an area without any air, like space. So sound cannot travel through space because there is no matter for the vibrations to work in.

Answer: A) 1.44% loss Explanation: SP of each car is Rs. 325475, he gains 12% on first car and losses 12% on second car.In this case, there will be loss and percentage of loss is given by = [(profit%)(loss%)]/100 = (12)(12)/100 % = 1.44%

Answer: A) 10000 and 15000 Explanation: As both A and B invest the same amounts, the ratio of their profits at the end of the year is equal to the ratio of the time periods for which they have invested.   Thus, the required ratio of their profits = A : B = 8 : 12 = 2 : 3.   Hence, share of A in the total profit = 2 x 25000/5 = Rs.10000   Similarly, share of B in the total profit = 3 x 25000/5 = Rs.15000

Answer: A) 21 व्याख्या: दी गई संख्या श्रृंखला एक पैटर्न का अनुसरण करती है, 19 + 12 = 20 (21 नहीं) 20 + 22 = 2424 + 32 = 3333 + 42 = 4949 + 52 = 74 इसलिए, दी गई संख्या श्रृंखला में विषम संख्या 21 है।

Answer: A) NH-1 Explanation: N.H. 1 is also called The Sher Shah Suri Marg between Delhi and Amritsar.

Answer: C) 50 Explanation: Given 7 + 7/7 + 7 x 7 - 7 By using BODMAS rule, 7 + 1 + 7 x 7 - 7 = 8 + 49 - 7 = 57 - 7 = 50.   Hence 7 + 7/7 + 7 x 7 - 7 = 50.

Answer: A) 19 Explanation: Initialy from left 7th = kumarfrom right 9th = pawanInterchange kumar = 11th from left, from right kumar = 9th;11+8 = 19;8 is 1,2,3,4,5,6,7(pawan),8,9,10,11(kumar),12,13,14,15,16,17,18,19;simply count the 9th place from right we will get total as 19.