IIT JEE Practice Question and Answer
8Q: The length of a rectangular plot is increased by 50%, to keep its area unchanged, the width of the plot should be decreased by ______? 1553 05b5cc6bce4d2b4197774d8ca
5b5cc6bce4d2b4197774d8ca- 129.87%false
- 233.33%true
- 322.22%false
- 419.5%false
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Answer : 2. "33.33%"
Explanation :
Answer: B) 33.33% Explanation: % Decrease in Width = 50150x100 = 33.33%
Q: Who has been appointed as the first woman Secretary General of the Lok Sabha? 1286 05b5cc6bce4d2b4197774d8c5
5b5cc6bce4d2b4197774d8c5- 1Rama Devifalse
- 2Sumitra Mahajanfalse
- 3Anupama Karefalse
- 4Snehlata Shrivastavatrue
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Answer : 4. "Snehlata Shrivastava"
Explanation :
Answer: D) Snehlata Shrivastava Explanation: Snehlata Shrivastava, appointed as the first woman Secretary General of the Lok Sabha. The appointment was made by Lok Sabha Speaker Sumitra Mahajan. Ms. Shrivastava will replace Anoop Mishra, who retired on November 30, 2017. Ms. Shrivastava, a senior civil servant with 35 years of rich and varied administrative experience is a 1982 batch IAS officer from the Madhya Pradesh cadre. Rama Devi holds the distinction of the being the first woman secretary general of the Rajya Sabha.
Q: 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 1618 05b5cc6bce4d2b4197774d8bb
5b5cc6bce4d2b4197774d8bb- 1270270false
- 254055true
- 37722false
- 4858false
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Answer : 2. "54055"
Explanation :
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
Q: Find the next number in the given series 0.25, 8, 128, 1024, ? 2256 05b5cc6bce4d2b4197774d8b1
5b5cc6bce4d2b4197774d8b1- 14096true
- 22526false
- 38486false
- 42620false
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Answer : 1. "4096"
Explanation :
Answer: A) 4096 Explanation: Here given series follows a pattern that 0.25, 8, 128, 1024, ? 0.25 x 32 = 8 8 x 16 = 128 128 x 8 = 1024 1024 x 4 = 4096
Q: How many years it takes for Pluto to Orbit the Sun? 1377 05b5cc6bce4d2b4197774d8b6
5b5cc6bce4d2b4197774d8b6- 176 yrsfalse
- 2144 yrsfalse
- 3198 yrsfalse
- 4248 yrstrue
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Answer : 4. "248 yrs"
Explanation :
Answer: D) 248 yrs Explanation: It takes 248 yrs for Pluto to orbit the Sun.
Q: A shopkeeper sold a mobile phone for Rs. 12000. Had he offered discount of 10% on the selling price, there would be a loss of 4%. What is the cost price of that Mobile phone? 1674 05b5cc6bce4d2b4197774d8a7
5b5cc6bce4d2b4197774d8a7- 1Rs. 12,500false
- 2Rs. 11,250true
- 3Rs. 12,750false
- 4Rs. 11,680false
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Answer : 2. "Rs. 11,250"
Explanation :
Answer: B) Rs. 11,250 Explanation: Given that SP = Rs. 12000 - 10% = Rs. 10,800 Loss% = 4 We know that, C.P = 100/(100 - Loss%) x 100 => 100/100-4 x 10800 => 1080000/96 C.P = Rs. 11,250
Q: Find the Missing number in the given Series ? 2, 3, 6, 15, ? , 157.5 1400 05b5cc6bce4d2b4197774d8ac
5b5cc6bce4d2b4197774d8ac- 187false
- 278.5false
- 356.5false
- 445true
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Answer : 4. "45"
Explanation :
Answer: D) 45 Explanation: Here given 2, 3, 6, 15, ? , 157.5 2 x 1.5 = 3 3 x 2 = 6 6 x 2.5 = 15 15 x 3 = 45 45 x 3.5 = 157.5 Therefore, the missing number is 45
Q: The average age of a class is 19 years. While the average age of girls is 18 and that of boys is 21. If the number of girls in the class is 16, Find the number of Boys in the class? 3627 05b5cc6bce4d2b4197774d8a2
5b5cc6bce4d2b4197774d8a2- 112false
- 210false
- 38true
- 46false
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Answer : 3. "8"
Explanation :
Answer: C) 8 Explanation: Let the number of boys = x From the given data, => [21x + 16(18)]/(x+16) = 19 => 21x - 19x = 19(16) - 16(18) => 2x = 16 => x = 8 Therefore, the number of boys in the class = 8.