IIT JEE प्रश्न और उत्तर का अभ्यास करें
8प्र: A is two years older than B who is twice as old as C. If the total of the ages of A, B and C be 27, then how old is B ? 1491 05b5cc6e7e4d2b4197774ed6f
5b5cc6e7e4d2b4197774ed6f- 110 yrstrue
- 211 yrsfalse
- 312 yrsfalse
- 413 yrsfalse
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उत्तर : 1. "10 yrs"
व्याख्या :
Answer: A) 10 yrs Explanation: Let C's age be x years. Then, B's age = 2x years. A's age = (2x + 2) years. (2x + 2) + 2x + x = 27 5x = 25 => x = 5 Hence, B's age = 2x = 10 years.
प्र: Find the odd letter/word from the given alternatives. 1490 05b5cc6cae4d2b4197774dff2
5b5cc6cae4d2b4197774dff2- 1Horsetrue
- 2Ewefalse
- 3Hindfalse
- 4Bitchfalse
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उत्तर : 1. "Horse"
व्याख्या :
Answer: A) Horse Explanation: Except Horse, remaining all belong to female category. Hind - Female Deer Ewe - Female Sheep Bitch - Female Dog.
प्र: Antonym of the word DOLEFUL : 1490 05b5cc6cee4d2b4197774e251
5b5cc6cee4d2b4197774e251- 1Lamentablefalse
- 2Dismalfalse
- 3Pitifulfalse
- 4Gladtrue
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उत्तर : 4. "Glad"
व्याख्या :
Answer: D) Glad Explanation:
प्र: Logical Challenge 1490 05b5cc6d3e4d2b4197774e494
5b5cc6d3e4d2b4197774e494- 124false
- 211false
- 314true
- 418false
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उत्तर : 3. "14"
व्याख्या :
Answer: C) 14 Explanation: 1 Grand mother 1 Mother 4 Wives 4x2 = 8 Daughters Total = 1 + 1 + 4 + 8 = 14 Female members.
प्र: What is x squared plus x squared? 1489 05b5cc666e4d2b4197774bef3
5b5cc666e4d2b4197774bef3- 14xfalse
- 22x^2true
- 3x^4false
- 42xfalse
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उत्तर : 2. "2x^2"
व्याख्या :
Answer: B) 2x^2 Explanation: In an algebraic expression, like terms are terms that contain the same variables raised to the same powers. Calculating x-squared plus x-squared is a matter of combining like terms. Now x^2 + x^2 = 2x^2 Hence, x-squared plus x-squared is equal to 2 times x squared.
प्र: At present, the ratio between the ages of Arun and Harish is 4:3. After 6 years, Arun's age will be 26 years. What is the age of Harish at present ? 1489 05b5cc6e1e4d2b4197774ebfc
5b5cc6e1e4d2b4197774ebfc- 115 yearstrue
- 216 yearsfalse
- 318 yearsfalse
- 421 yearsfalse
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उत्तर : 1. "15 years"
व्याख्या :
Answer: A) 15 years Explanation: Let the present ages of Arun and Harish be 4x and 3x years respectively. Then, 4x + 6 = 26 => x = 5 Harish's age = 3x = 15 years.
प्र: In how many different ways can the letters of the word 'POVERTY' be arranged ? 1489 05b5cc6b4e4d2b4197774d4bb
5b5cc6b4e4d2b4197774d4bb- 12520false
- 25040true
- 31260false
- 4Nonefalse
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उत्तर : 2. "5040"
व्याख्या :
Answer: B) 5040 Explanation: The 7 letters word 'POVERTY' be arranged in 7P7 ways = 7! = 5040 ways.
प्र: A bus covers its journey at the speed of 80km/hr in 10hours. If the same distance is to be covered in 4 hours, by how much the speed of bus will have to increase ? 1488 05b5cc6cfe4d2b4197774e2dc
5b5cc6cfe4d2b4197774e2dc- 185 km/hrfalse
- 295 km/hrfalse
- 3105 km/hrfalse
- 4120 km/hrtrue
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उत्तर : 4. "120 km/hr"
व्याख्या :
Answer: D) 120 km/hr Explanation: Initial speed = 80km/hrTotal distance = 80 x 10 = 800kmNew speed = 800/4 =200km/hrIncrease in speed = 200 - 80 = 120km/hr