Maths Practice Question and Answer
8 Q: Find the value of $$ \sqrt{20+\sqrt{29-\sqrt{12+\sqrt{19-\sqrt{9}}}}}$$.
1988 05fc477e1070eb7152d7ea27b
5fc477e1070eb7152d7ea27b- 14false
- 23false
- 35true
- 41false
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Answer : 3. "5"
Q: A cricketer had a certain average of runs for his 64 innings. In his 65th innings, he is bowled out for no score on his part. This brings down his average by 2 runs. His new average of runs is:
1987 05f2a8dc6a7bb0b71009fdc07
5f2a8dc6a7bb0b71009fdc07- 170false
- 268false
- 3130false
- 4128true
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Answer : 4. "128 "
Q: The current ages of Sonali and Monali are in the ratio 5:3. Five years from now, their ages will be in the ratio 10:7 Then, Monali’s current age is:
1987 05f068216b13c2d244ad91aed
5f068216b13c2d244ad91aed- 13 yearsfalse
- 25 yearsfalse
- 39 yearstrue
- 415 yearsfalse
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Answer : 3. "9 years"
Q: The average age of students in a class is 15.8 years. The average age of boys in the class is 16.4 years and that of the girls is 15.4 years. The ratio of the number of boys to the number of girls in the class is:
1985 05ed73fd04bd6e60aba370eb4
5ed73fd04bd6e60aba370eb4- 11: 4false
- 24 : 2false
- 32 : 3true
- 43 : 4false
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Answer : 3. "2 : 3"
Q: A work could be completed in 100 days by some workers. However, due to the absence of 10 workers, it was completed in 110 days. The original number of workers was
1983 05f59f452b772fe2f8b238e1f
5f59f452b772fe2f8b238e1f- 1100false
- 2110true
- 355false
- 450false
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Answer : 2. "110"
Q: A and B can do a piece of work in 72 days. B and C can do it in 120 days. A and C can do it in 90 days. In how many days all three together can do the work ? 1982 05cf0f244c97a225730e3b25d
5cf0f244c97a225730e3b25d- 180 daysfalse
- 2100 daysfalse
- 360 daystrue
- 4150 daysfalse
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Answer : 3. " 60 days"
Q: What is the average of the following numbers?
38, 92, 45, 25, 60
1982 05da059f500e22578c9e9a658
5da059f500e22578c9e9a65838, 92, 45, 25, 60
- 148false
- 254false
- 356false
- 450false
- 5None of thesetrue
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Answer : 5. "None of these"
Q: The twice of sum of the ages of a father and his son is 8 times the age of the son. If the average age of the father and the son is 30 years, what is father's age ? 1981 05b5cc6c9e4d2b4197774df83
5b5cc6c9e4d2b4197774df83- 142 yrsfalse
- 245 yrstrue
- 336 yrsfalse
- 438 yrsfalse
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Answer : 2. "45 yrs"
Explanation :
Answer: B) 45 yrs Explanation: Let father's age be x year and son's age be y year. According to question, 2(x+y) = 8y _______(I) and (x+y)/2 = 30 => x+y = 60 years__________(II) From equation (I) and (II) 8 y = 120 y = 15 years, Hence x = 45 years.