Maths Practice Question and Answer
8 Q: Given that √4096 = 64, the value of √4096 + √40.96 +√0.004096 is-
899 0630354362876110d0951ddd8
630354362876110d0951ddd8- 170.4false
- 270.464true
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Answer : 2. "70.464"
Explanation :
Given Exp. = √4096 + √40.96 +√0.004096
= 64 + 6.4 + 0.064
= 70.464 Q: A can do a piece of work in 24 day, B in 32 days and C in 64 days. All begin to do it together, but A leaves after 6 days and B leaves 6 days before the completion of the work. How many days did the work last?
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6303533d29cb463044247b55- 115false
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Answer : 2. "20"
Q: P, Q, R are employed to do a work for Rs. 5750. P and Q together finished 19/23 of work and Q and R together finished 8/23 of work. Wage of Q, in rupees, is-
1295 0630352652876110d0951d44d
630352652876110d0951d44d- 12850false
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Answer : 4. "1000"
Q: When (6767 +67) is divided by 68, the remainder is-
1132 06303364629cb46304423ee34
6303364629cb46304423ee34- 113false
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Answer : 3. "66"
Explanation :
(6767+ 67) = 67(6766 + 166)
As 66 is an even number
We know 6766 is an even number
We know (6766 + 1) is perfectly divisible by (67 + 1)
i.e. 68
We know The remainder = 66
(6767+ 67) = 67(6766 + 166)
Q: The sum of the squares of two natural consecutive odd numbers is 394. The sum of the numbers is –
943 06303357ffef7996822e8f226
6303357ffef7996822e8f226- 124false
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Answer : 4. "28"
Explanation :
Let the consecutive odd numbers be x and (x+2)
We know that x2 + (x + 2)2 = 394
We know x2 + x2 + 4x + 4 = 394
We know 2 x2 +4x – 390 = 0
We know x2 + 2x – 195 = 0
We know (x +15) (x-13) = 0
We know x = 13
We know Required sum = 13 +15 =28
Q: √6+√6+√6+… is equal to –
891 0630334cec3bfb21b4ac22a32
630334cec3bfb21b4ac22a32- 12false
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Answer : 4. "3"
Explanation :
Let √6+√6+√6+…. be x.
We know x =√6+x
We know x2 = 6+x
We know x2 - x – 6 = 0
We know (x-3) (x+2) = 0
We know x = 3 Q: The value of (81)3.6 * (9)2.7/ (81)4.2 * (3) is __
1136 063033460c3bfb21b4ac229c4
63033460c3bfb21b4ac229c4- 13false
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Answer : 3. "9"
Explanation :
(81)3.6 * (9)2.7/(81)4.2 * (3) = (3)14.4 * (3)5.4/(3)16.8 * (3)
= 314.4+5.4-16.8-1
= 32
= 9 Q: The product of 2 numbers is 1575 and their quotient is 9/7. Then the sum of the numbers is –
848 0630333c0c3bfb21b4ac2185c
630333c0c3bfb21b4ac2185c- 174false
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Answer : 3. "80"
Explanation :
Let the numbers be x and y .
We know xy = 1575
And x/y = 9/7
We know xy/x/y = 1575/9/7
We know y2 = 1225
We know y = 35 and x = 45
We know The sum of the numbers = 45+35
= 80

