**IIT JEE **Practice Question and Answer

8## Q: How many even numbers are there in the following sequence of numbers which are immediately followed by an odd number as well as immediately preceded by an even number? 8 5 8 6 7 6 8 9 3 2 7 5 3 4 2 2 3 5 5 2 2 8 1 1 9 3 1 7 5 1 365 05b5cc7f2e4d2b41977751ea2

5b5cc7f2e4d2b41977751ea2- 12false
- 23false
- 34true
- 45false

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## Answer : 3. "4"

Explanation :

Answer: C) 4 Explanation: We have to find out even number - even number - odd number sequence. 8 5 8 6 7 6 8 9 3 2 7 5 3 4 2 2 3 5 5 2 2 8 1 1 9 3 1 7 5 1 There are four such such even numbers: 6,8,2 and 8.

## Q: If it is possible to make a number which is the square of a two-digit odd number using the second, the fourth and the sixth digits of the number 93217648 and using each only once, which of the following is that two-digit odd number? 389 05b5cc7f2e4d2b41977751e89

5b5cc7f2e4d2b41977751e89- 117false
- 219true
- 315false
- 421false

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## Answer : 2. "19"

Explanation :

Answer: B) 19 Explanation: Second, fourth and the sixth digits of the number are 3, 1 and 6. Using these digits only once we can make 361, which is a perfect square number. Hence, our answer is 19 x 19 = 361

## Q: How many such pairs of digits are there in the number 421579368 each of which has as many digits between them in the number as when they are arranged in ascending order? 2425 05b5cc7f2e4d2b41977751e93

5b5cc7f2e4d2b41977751e93- 1Nonefalse
- 2Onefalse
- 3Twofalse
- 4Threetrue

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## Answer : 4. "Three"

Explanation :

Answer: D) Three Explanation: Given Number: 4 2 1 5 7 9 3 6 8 Ascending order: 1 2 3 4 5 6 7 8 9 Hence the required pairs are 12, 49, 16

## Q: If the digits in the number 25673948 are arranged in ascending order from left to right, what will be the sum of the digits which are fourth from the right and third from the left in the new arrangement? 359 05b5cc7f2e4d2b41977751e7a

5b5cc7f2e4d2b41977751e7a- 110true
- 29false
- 38false
- 46false

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## Answer : 1. "10"

Explanation :

Answer: A) 10 Explanation: Given Number : 2 5 6 7 3 9 4 8 Ascending order : 2 3 4 5 6 7 8 9 Specified letters are 6 and 4 respectively. Hence, required sum = (4 + 6 = 10)

## Q: The purest form of iron is 297 05b5cc7efe4d2b41977751d76

5b5cc7efe4d2b41977751d76- 1wrought irontrue
- 2steelfalse
- 3pig ironfalse
- 4nickel steelfalse

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## Answer : 1. "wrought iron"

Explanation :

Answer: A) wrought iron Explanation: Wrought Iron is the purest form of iron. It contains 0.12 to 0.25% carbon and so it is the purest form of iron.

## Q: The State which tops in the production of rubber is 715 25b5cc7ece4d2b41977751bf5

5b5cc7ece4d2b41977751bf5- 1Tamil Nadufalse
- 2Karnatakafalse
- 3Keralatrue
- 4Orissafalse

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## Answer : 3. "Kerala"

Explanation :

Answer: C) Kerala Explanation: A uniformly high temperature of 800F and the annual rainfall of 80 inches or more, required by rubber is available in Kerala.

## Q: Which region in India is known as the "Rice Bowl of India"? 2041 25b5cc7dfe4d2b41977751659

5b5cc7dfe4d2b41977751659- 1Indo-Gangetic plainfalse
- 2Krishna-Godavari Delta regiontrue
- 3North-East regionfalse
- 4Kerala and Tamil Nadufalse

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## Answer : 2. "Krishna-Godavari Delta region"

Explanation :

Answer: B) Krishna-Godavari Delta region Explanation: In India, the Krishna-Godavari Delta region is called as "Rice Bowl of India". Coming to the Indian State, Chhattisgarh is known as Rice Bowl of India.

## Q: A milkman has 20 liters of milk. If he mixes 5 liters of water, which is freely available, in 20 liters of pure milk. If the cost of pure milk is Rs. 18 per litre, then the profit of the milkman, when he sells all the mixture at cost price, is: 1581 35b5cc7d7e4d2b4197775151f

5b5cc7d7e4d2b4197775151f- 120%false
- 225%true
- 333.33%false
- 418%false

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## Answer : 2. "25%"

Explanation :

Answer: B) 25% Explanation: When the water is freely available and all the water is sold at the price of the milk, then the water gives the profit on the cost of 20 litres of milk. Since, the profit % = ProfitCostPricex100 Therefore, profit percentage = 520x100 = 25%