GATE Practice Question and Answer
8Q: Which number replaces 'x' in the below figure ? 1813 05b5cc774e4d2b41977750052
5b5cc774e4d2b41977750052- 12false
- 29true
- 311false
- 412false
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Answer : 2. "9"
Explanation :
Answer: B) 9 Explanation: Here in 2nd column if you add the individual digits we get 3 + 7 + 0 =10 , 2 + 2 + 4 = 8 , 7 + 3 + 0 = 10 7 10 3 --> 7+3 =10 6 8 2 --> 6+2 =8 x 10 1 --> x+1 =10 Here we can observe that by adding 1st and 3rd column elements we get 2nd column elements --> x = 9
Q: What percent of a day is 3 hours? 1812 05b5cc69ae4d2b4197774c778
5b5cc69ae4d2b4197774c778- 114.9%false
- 212.5%true
- 315.6%%false
- 411.4%false
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Answer : 2. "12.5%"
Explanation :
Answer: B) 12.5% Explanation: Let p% of a day is 3 hrs. We know that a day has 24 hrs. => p x 24/100 = 3 => p = 300/24 => p = 12.5% Hence, 3 hrs is 12.5% of a day.
Q: There are 41 students in a class, number of girls is one more than number of guys. we need to form a team of four students. all four in the team cannot be from same gender. number of girls and guys in the team should NOT be equal. How many ways can such a team be made ? 1811 05b5cc709e4d2b4197774f262
5b5cc709e4d2b4197774f262- 149450false
- 250540true
- 346587false
- 452487false
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Answer : 2. "50540"
Explanation :
Answer: B) 50540 Explanation: Given G + B= 41 and B = G-1 Hence, G = 21 and B = 20Now we have 2 options, 1G and 3M (or) 3G and 1M(2G and 2M or 0G and 4M or 4G and oM are not allowed), Total : C121×C320+C321×C120= 50540 ways.
Q: A, B and C can do a piece of work in 72, 48 and 36 days respectively. For first p/2 days, A & B work together and for next ((p+6))/3days all three worked together. Remaining 125/3% of work is completed by D in 10 days. If C & D worked together for p day then, what portion of work will be remained? 1810 05b5cc669e4d2b4197774bf4d
5b5cc669e4d2b4197774bf4d- 11/5false
- 21/6true
- 31/7false
- 41/8false
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Answer : 2. "1/6"
Explanation :
Answer: B) 1/6 Explanation: Total work is given by L.C.M of 72, 48, 36 Total work = 144 units Efficieny of A = 144/72 = 2 units/day Efficieny of B = 144/48 = 3 units/day Efficieny of C = 144/36 = 4 units/day According to the given data, 2 x p/2 + 3 x p/2 + 2 x (p+6)/3 + 3 x (p+6)/3 + 4 x (p+6)/3 = 144 x (100 - 125/3) x 1/100 3p + 4.5p + 2p + 3p + 4p = 84 x 3 - 54 p = 198/16.5 p = 12 days. Now, efficency of D = (144 x 125/3 x 1/100)/10 = 6 unit/day (C+D) in p days = (4 + 6) x 12 = 120 unit Remained part of work = (144-120)/144 = 1/6.
Q: 3 is what percent of 5? 1810 05b5cc64ae4d2b4197774bc0c
5b5cc64ae4d2b4197774bc0c- 145%false
- 260%true
- 372%false
- 480%false
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Answer : 2. "60%"
Explanation :
Answer: B) 60% Explanation: Here it is asked that 3 is what percent of 5 Let 3 is K percent of 5. => K x 5/100 = 3 => K = 300/5 = 60 Hence, 3 is 60% of 5.
Q: 8 S on a SS means? 1810 05b5cc6abe4d2b4197774d071
5b5cc6abe4d2b4197774d071- Show AnswerHide Answer
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Answer :
Explanation :
8 S on SS means 8 Sides on a Stop Sign. This is one type of Letter Equations which are well known phrases or facts where the key words have been replaced with the first letter of that word. These are often in the form of an equation, which contain a number, an = sign and the rest of the obscured phrase or fact. Some more of them are :: 90 D in a RA 26 L of the A 12 S of the Z.
Q: Chennai express left Hyderabad for Chennai at 14 : 30 hours, travelling at a speed of 60 kmph and Charminar Express left Hyderabad for Chennai on the same day at 16 : 30 hours, travelling at a speed of 80 kmph. How far away from Hyderabad will the two trains meet? 1809 05b5cc6abe4d2b4197774d067
5b5cc6abe4d2b4197774d067- 1360 kmsfalse
- 2480 kmstrue
- 3520 kmsfalse
- 4240 kmsfalse
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Answer : 2. "480 kms"
Explanation :
Answer: B) 480 kms Explanation: Now, the distance covered by Chennai express in 2 hrs = 60 x 2 = 120 kms Let the Charminar Express takes 't' hrs to catch Chennai express => 80 x t = 60 x (2 + t) => 80 t = 120 + 60t => t = 6 hrs Therefore, the distance away from Hyderabad the two trains meet = 80 x 6 = 480 kms.
Q: Which of the Following is an Amorphous solid? 1808 05b5cc6a6e4d2b4197774cd60
5b5cc6a6e4d2b4197774cd60- 1Quartz Glass(Sio2)true
- 2Chrome Alumfalse
- 3Silicon Carbide(SiC)false
- 4Graphitefalse
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Answer : 1. "Quartz Glass(Sio2)"
Explanation :
Answer: A) Quartz Glass(Sio2) Explanation: An amorphous or non-crystalline solid is a solid that lacks the long-range order that is characteristic of a crystal. In Brief, An amorphous solid is any noncrystalline solid in which the atoms and molecules are not organized in a definite lattice pattern. Such solids include glass, plastic, and gel. Quartz glass (SiO2) is an amorphous solid due to its short range order of constituent particles. Note Quartz is a crystalline solid while quartz glass is an amorphous solid.

