IIT JEE प्रश्न और उत्तर का अभ्यास करें
8प्र: How many squares do you see? 1941 05b5cc699e4d2b4197774c724
5b5cc699e4d2b4197774c724- 144false
- 245true
- 346false
- 450false
- उत्तर देखेंउत्तर छिपाएं
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उत्तर : 2. "45"
व्याख्या :
Answer: B) 45 Explanation: Number of squares in the given figure is 16 + 9 + 19 + 1 = 45.
प्र: Which of these did progressives support? 1940 05b5cc636e4d2b4197774ba13
5b5cc636e4d2b4197774ba13- उत्तर देखेंउत्तर छिपाएं
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उत्तर :
व्याख्या :
One of the thing that progressive support would be: Direct election of senators. The progressive wanted this so they could the candidate based on the person and not the party.Direct election of senators will make it easier for them to elect the person that represent their value for the position.
प्र: Express 3/8 and 1/10 as a Decimals? 1940 05b5cc6b3e4d2b4197774d437
5b5cc6b3e4d2b4197774d437- 11.375 & 1false
- 20.375 & 1false
- 313.75 & 1.1false
- 40.375 & 0.1true
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उत्तर : 4. "0.375 & 0.1"
व्याख्या :
Answer: D) 0.375 & 0.1 Explanation: 3/8 as a Decimal : In this we should convert the denominator into 10, 100, 1000, 10000, 100000,... to make it simple. Now to make 8 into 1000, we multiply numerator and denominator with 125 => 3 x 1258 x 125 = 3751000 = 0.375 1/10 as a Decimal : 1 divided into 10 parts of each 0.1. Therefore, 3/8 = 0.375 and 1/10 = 0.1 in decimals.
प्र: Two trains are running with speeds 30 kmph and 58 kmph respectively in the same direction. A man in the slower train passes the faster train in 18 seconds. Find the length of the faster train? 1940 05b5cc67ee4d2b4197774c23f
5b5cc67ee4d2b4197774c23f- 1105 mtsfalse
- 2115 mtsfalse
- 3120 mtsfalse
- 4140 mtstrue
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उत्तर : 4. "140 mts"
व्याख्या :
Answer: D) 140 mts Explanation: Speeds of two trains = 30 kmph and 58 kmph => Relative speed = 58 - 30 = 28 kmph = 28 x 5/18 m/s = 70/9 m/s Given a man takes time to cross length of faster train = 18 sec Now, required Length of faster train = speed x time = 70/9 x 18 = 140 mts.
प्र: What is the angle made by the hour hand and the minute hand, if the clock shows 9:15 pm ? 1939 05b5cc6d2e4d2b4197774e410
5b5cc6d2e4d2b4197774e410- 1165 degreesfalse
- 2172.5 degreestrue
- 3112.5 degreesfalse
- 4125.5 degreesfalse
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उत्तर : 2. "172.5 degrees"
व्याख्या :
Answer: B) 172.5 degrees Explanation: The minute hand angle is the easiest since an hour (i.e. 60 minutes) corresponds to the entire 360 degrees, each minute must correspond to 6 degrees. So just multiply the number of minutes in the time by 6 to get the number of degrees for the minute hand. Here 15 minutes corresponds to 15 x 6 = 90 degrees Next, you have to figure out the angle of the hour hand. Since there are 12 hours in the entire 360 degrees, each hour corresponds to 30 degrees. But unless the time is EXACTLY something o'clock, you have to write the time as a fractional number of hours rather than as hours and minutes.Here the time is 9:15 which is (9 + 15/60) = 37/4 hours. Since each hour corresponds to 30 degrees, we multiply 30 to get (37/4)(30) = 277.5 degrees. Since the hour hand is at 277.5 degrees and the minute hand is at 90 degrees, we can subtract to get the angle of separation. 277.5 - 90 = 187.5 =~ 360 - 187.5 = 172.5 degrees.
प्र: A polygenic trait is controlled by 3 genes A, B and C. In a cross AaBbCc x AaBbCc, the phenotypic ratio of the offsprings was observed as 1 : 6 : m : 20 : m : 6 : 1. What is the value of m? 1939 05b5cc697e4d2b4197774c5ff
5b5cc697e4d2b4197774c5ff- 110false
- 215true
- 318false
- 424false
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उत्तर : 2. "15"
व्याख्या :
Answer: B) 15 Explanation: Here crossing is AaBbCc x AaBbCc As it is trihybrid cross, we know, Number of zygotes formed = 4n, where n = 3 43 = 64 Given ratio of offsprings = 1 : 6 : m : 20 : m : 6 : 1 Now, 1 + 6 + m + 20 + m + 6 + 1 = 64 34 + 2m = 64 2m = 30 => m = 15.
प्र: Voiceless it cries, wingless flutters, toothless bites, mouth-less mutters. What is it? 1939 05b5cc619e4d2b4197774b74c
5b5cc619e4d2b4197774b74c- उत्तर देखेंउत्तर छिपाएं
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उत्तर :
व्याख्या :
It is The Wind which cries without a voice, flutters without wings, bites toothless and mutters mouthless.
प्र: What can you hear but not touch or see? 1938 05b5cc69ee4d2b4197774c96a
5b5cc69ee4d2b4197774c96a- उत्तर देखेंउत्तर छिपाएं
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उत्तर :
व्याख्या :
The sound is what can you hear but not touch or see.

