Maths Practice Question and Answer
8 Q: The east positive integer that should be subtracted from 3011 x 3012 so that the difference is a perfect square is-
1465 0630351bd29cb4630442475e5
630351bd29cb4630442475e5- 13009false
- 23010false
- 33011true
- 43012false
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Answer : 3. "3011"
Explanation :
We know that 3011 x 3012
= 3011 (3011 + 1)
= (3011)2 + 3011
We know
Required least number = 3011
Q: 1261 in 3 years at the rate of 5 percent annual interest on a sum of money. Interest is received by compound . money will be
1465 0603740a69d90e74af72ae9da
603740a69d90e74af72ae9da- 19000false
- 28400false
- 37500false
- 48000true
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Answer : 4. "8000"
Q: A man can row 52 km upstream and 42 km downstream in 10 hours. It is also known that he can row 66 km downstream and 60 km upstream in 13 hours. Find the speed of the man in still water.
1465 064ddf1f974cca4494978a953
64ddf1f974cca4494978a953- 18 km/hrfalse
- 212 km/hrfalse
- 36 km/hrfalse
- 410 km/htrue
- 5None of thesefalse
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Answer : 4. "10 km/h"
Q: If S denotes the area of the curved surface of a right circular cone of height h and semi vertical angle ∝ then S equals
1464 0638f327d34f83f147297f901
638f327d34f83f147297f901- 1$$πh^2 tan^2∝ $$false
- 2$${1\over 3}πh^2tan^2∝$$false
- 3$$πh^2sec∝tan∝$$true
- 4$${1\over 3}πh^2sec∝tan∝$$false
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Answer : 3. "$$πh^2sec∝tan∝$$"
Q: If x is real then the minimum value of (x2-x-1) is :
1464 05f1e99181b4d8003eeb16b6c
5f1e99181b4d8003eeb16b6c- 11false
- 2$$-{5\over 4}$$true
- 3$$3\over 4 $$false
- 40false
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Answer : 2. " $$-{5\over 4}$$"
Q: Find the LCM of x and (x+3).
1464 0609e5c77e941dd6183d9b5e4
609e5c77e941dd6183d9b5e4- 1x(x+3)true
- 2x2(x+3)false
- 3(x+3)false
- 4xfalse
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Answer : 1. "x(x+3)"
Q: A certain sum of money lent out at simple interest amounts to Rs. 2400 in 4 years and Rs. 3000 in 6 years. Find the rate of interest per annum?
1464 063d0c6d10d9e560db8e9f83c
63d0c6d10d9e560db8e9f83c- 120 %false
- 218 %false
- 325 %true
- 415 %false
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Answer : 3. "25 %"
Q: The total surface area of a hemisphere is 166.32 sq cm, find its radius?
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5f0e762d1090a058653e57e0- 14.2 cmtrue
- 28.4 cmfalse
- 31.4 cmfalse
- 42.1 cmfalse
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