Maths Practice Question and Answer
8 Q: Two positive numbers differ by 1280. When the greater number is divided by the smaller number, the quotient is 7 and the remainder is 50. The greater number is:
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64bfb2f4e2108a7239492d0d- 11558false
- 21458false
- 31585false
- 41485true
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Answer : 4. "1485"
Explanation :
Given :- Two positive numbers differ by 1280
When the greater number is divided by the smaller number The quotient is 7 and the remainder is 50
Concept :- Dividend = Quotient × divisor + remainder
Calculation :- Let greater number = a and Smaller number = b From question, ⇒ a - b = 1280 ....(1) Again from question, ⇒ a = 7b + 50 ....(2)
Put the value of a from equation (2) into equation (1) ⇒ 7b + 50 - b = 1280 ⇒ 6b = 1280 - 50 ⇒ 6b = 1230 ⇒ b = (1230/6) ⇒ b = 205
Put the value of b in equation (1) ⇒ a - 205 = 1280 ⇒ a = 1280 + 205 ⇒ a = 1485 ⇒ Greater number = 1485 ∴ Greater number is 1485
Q: The sum of ages of mother and son is 47 years. Before 10 years, the product of their ages is 50. The difference between the ages of mother and a son is –
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63d0d798e144980db727cf87- 125 yearsfalse
- 223 yearstrue
- 311 yearsfalse
- 49 yearsfalse
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Answer : 2. "23 years"
Q:Directions: Find the wrong number in the following number series:
2, 3, 8, 31, 154, 924, 6460
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64d4b805ebd5c3747277ead0- 1924true
- 26460false
- 3154false
- 48false
- 531false
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Answer : 1. "924"
Q: The areas of the three adjacent faces of a cuboid are 32 cm2, 24 cm2 and 48cm2. What is the volume of the cuboid?
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6007ece9a41f3f2fa419b494- 1288 cm3false
- 2256 cm3false
- 3128 cm3false
- 4192 cm3true
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Answer : 4. "192 cm3"
Q: If the sum of the squares of three consecutive natural numbers is 110, then the smallest of these natural numbers is:
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5ef023f06d3c5c4869f2a158- 16false
- 25true
- 38false
- 47false
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Answer : 2. "5 "
Q: The marked price of an article is Rs.800. A retailer buys it for Rs.540 after getting two successive discounts. The first discount is 25 %. What is the second discount?
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605316f3a01bc44789ae0ff1- 18 %false
- 212 %false
- 310 %true
- 415 %false
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Answer : 3. "10 %"
Q: Two pipes, A and B, can fill a tank in X minutes and 6 minutes, respectively. If both the pipes are used together, then they take 1.5 minute to fill the tank. Find the value of X.
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608292eb60a06a7ffdaaf8a3- 11 minfalse
- 24 minfalse
- 35 minfalse
- 42 mintrue
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Answer : 4. "2 min"
Q: A sum triple itself in 9 years at simple interest. Find the rate of interest per annum is.
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64b50596e154aff53372df18- 1$$38{2\over 9} \% $$false
- 2$$33{1\over 3} \% $$false
- 3$$27{1\over 9} \% $$false
- 4$$22{2\over 9} \% $$true
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