IIT JEE प्रश्न और उत्तर का अभ्यास करें
8प्र: Which of the following is not an enzyme? 1600 05b5cc62ce4d2b4197774b907
5b5cc62ce4d2b4197774b907- 1Oxytocintrue
- 2Trypsinfalse
- 3Pepsinfalse
- 4Ptyalinfalse
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उत्तर : 1. "Oxytocin"
व्याख्या :
Answer: A) Oxytocin Explanation: Oxytocin is a mamallian hormone and also acts as neuro transmitter in the brain.
प्र: Which one of the following is often called "Twitter of China" ? 1600 05b5cc6c1e4d2b4197774db91
5b5cc6c1e4d2b4197774db91- 1Youkufalse
- 2Sina weibotrue
- 3We chatfalse
- 4Nonefalse
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उत्तर : 2. "Sina weibo"
व्याख्या :
Answer: B) Sina weibo Explanation:
प्र: What role does Dalvik play in Android development ? 1599 05b5cc73de4d2b4197774f95c
5b5cc73de4d2b4197774f95c- उत्तर देखेंउत्तर छिपाएं
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उत्तर :
व्याख्या :
Dalvik serves as a virtual machine, and it is where every Android application runs. Through Dalvik, a device is able to execute multiple virtual machines efficiently through better memory management.
प्र: The average age of 80 boys in a class is 15. The average age of group of 15 boys in the class is 16 and the average of another 25 boys in the class is 14. What is the average age of the remaining boys in the class ? 1599 05b5cc736e4d2b4197774f883
5b5cc736e4d2b4197774f883- 112.24 yrsfalse
- 213.25 yrsfalse
- 316 yrsfalse
- 415.25 yrstrue
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उत्तर : 4. "15.25 yrs"
व्याख्या :
Answer: D) 15.25 yrs Explanation: Total ages of 80 boys = 15 x 80 = 1200 yrs.Total age of 16 boys = 15 x 16 = 240 yrsTotal age of 25 boys = 14 x 25 = 350 yrs.Average age of remaining boys = 1200 - (240+350) / 80 - (25+15) = 610/41 = 15.25 yrs.
प्र: In following number series only one number is wrong. Find out that wrong or odd number in the series? 6, 78, 858, 7722, 54055, 270270 1599 05b5cc6bce4d2b4197774d8bb
5b5cc6bce4d2b4197774d8bb- 1270270false
- 254055true
- 37722false
- 4858false
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उत्तर : 2. "54055"
व्याख्या :
Answer: B) 54055 Explanation: Here the given series follows a pattern that, multiplying the number with odd numbers in decreasing order starting with 13. That is, 6 × 13 = 78 65 × 11 = 858 858 × 9 = 7722 7722 × 7 = 54054 54054 × 5 = 270270 Hence, the wrong number is 54055
प्र: Maneela lent Rs. 8000 partly at the rate of 5% and partly at the rate of 6% per annum simple interest. The total interest she get after 2 years is Rs. 820, then in which ratio will Rs. 8000 is to be divided? 1599 05b5cc6bee4d2b4197774d9b5
5b5cc6bee4d2b4197774d9b5- 17:1true
- 213:5false
- 315:7false
- 42:7false
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उत्तर : 1. "7:1"
व्याख्या :
Answer: A) 7:1 Explanation: Maneela lent Rs. 8000 in two parts,
प्र: According to new federal data released, the US state whose economy has surpassed that of the UK to become the world’s fifth largest was 1598 05b5cc688e4d2b4197774c313
5b5cc688e4d2b4197774c313- 1Massachusettsfalse
- 2Floridafalse
- 3Hawaiifalse
- 4Californiatrue
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उत्तर : 4. "California"
व्याख्या :
Answer: D) California Explanation: The US state California's economy has surpassed that of the UK to become the world’s fifth largest, according to new federal data released. With a GDP of $2.7 trillion, California is now only behind the US, China, Japan and Germany.
प्र: How many six digit odd numbers can be formed from the digits 0, 2, 3, 5, 6, 7, 8, and 9 (repetition not allowed)? 1598 05b5cc6b7e4d2b4197774d5f2
5b5cc6b7e4d2b4197774d5f2- 18640true
- 2720false
- 33620false
- 44512false
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उत्तर : 1. "8640"
व्याख्या :
Answer: A) 8640 Explanation: Let the 6 digits of the required 6 digit number be abcdef Then, the number to be odd number the last digit must be odd digit i.e 3, 5, 7 or 9 The first digit cannot be ‘0’ => possible digits = 3, 5, 7, 2, 6, 8 Remaining 4 places can be of 6 x 5 x 4 x 3 ways This can be easily understood by Therefore, required number of ways = 6 x 6 x 5 x 4 x 3 x 4 = 36 x 20 x 12 = 720 x 12 = 8640 ways.

