Maths Practice Question and Answer
8 Q: A number when divided by 119, leaves a remainder of 19. If it is divided by 17, it will leave a remainder of:
1714 0614c68834d59797c590e504e
614c68834d59797c590e504e- 119false
- 27false
- 310false
- 42true
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Answer : 4. "2 "
Explanation :
On dividing the given number by 119, let k be the quotient and 19 as remainder.
Then, number = 119k + 19
= 17 × 7k + 17 × 1 + 2
= 17 (7k + 1) + 2
Hence, the given number when divided by 17, gives (7k + 1) as quotient and 2 as remainder.
Q: An iron pipe 20 cm long has exterior diameter 25 cm. If the thickness of the pipe is 1 cm, then the whole surface area of the pipe?
1714 05f59d091b772fe2f8b223a57
5f59d091b772fe2f8b223a57- 1$$ {3168\ cm^{2}}$$true
- 2$$ {3186\ cm^{2}}$$false
- 3$$ {3200\ cm^{2}}$$false
- 4$$ {3150\ cm^{2}}$$false
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Answer : 1. "$$ {3168\ cm^{2}}$$"
Q: A can finish work in 18 days and B in 36 days. If they work on it together for 9 days, what percent of work is left?
1714 05ffd7dff605e8a6ae8f29783
5ffd7dff605e8a6ae8f29783- 133.33false
- 220false
- 375false
- 425true
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Answer : 4. "25"
Q: The ratio of working efficiency at X and Y is 3:7. Working together, they can complete the work in 15 days. They together worked for 7 days. Then, find the time taken by X to complete 60% at the remaining work.
1714 0602e43b46ea6434ffa7c48e7
602e43b46ea6434ffa7c48e7- 117 daysfalse
- 218 daysfalse
- 316 daystrue
- 416.5 daysfalse
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Answer : 3. "16 days "
Q: PA and PB are two tangents to a circle with center o from a point P outside the circle. A and B are points on the circle. If ∠OAB = 35° than ∠APB is equal to:
1714 05dcd40dadefbe923a9530edf
5dcd40dadefbe923a9530edf- 1$$70^0$$true
- 2$$20^0$$false
- 3$$25^0$$false
- 4$$35^0$$false
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Answer : 1. "$$70^0$$"
Q: $$ {109.07\sqrt{?}}-{61\over 21.02} ×?=47.96\sqrt{?}$$
1714 06040ab1f0634b252a6ba8190
6040ab1f0634b252a6ba8190- 1441true
- 2169false
- 3250false
- 4121false
- 5324false
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Answer : 1. "441"
Q: 0.8% of a number is 31, then find the number.
1714 0601906fe6d6bae40a636276a
601906fe6d6bae40a636276a- 12860false
- 24485false
- 33375false
- 43875true
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Answer : 4. "3875"
Q: If the length and breadth of a rectangle are in the ratio 3:2 and its perimeter is 20 cm, then the area of the rectangle (in cm2) is
1713 05d709baa3b18207684dae264
5d709baa3b18207684dae264- 1$$ {24}\ cm^2 $$true
- 2$$ {36}\ cm^2 $$false
- 3$$ {48}\ cm^2 $$false
- 4$$ {12}\ cm^2 $$false
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Answer : 1. " $$ {24}\ cm^2 $$"
Explanation :
2(3x+2x)=20
x=2
then the length and breadth of a rectangle is 6, and 4
The Area of Rectangle will be Length*breadth=6*4=24 cm2