1 .The quantity of water that should be added to reduce 18 ml lotion containing 50% alcohol to the lotion containing 30% alcohol is–
Answer & Explanation
Answer : Option D |
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Explanation : |
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2 .The length of a rectangle is increased by 40%. By what percent the width of the rectangle have to be decreased to maintain the same area?
Answer & Explanation
Answer : Option B |
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Explanation : |
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3 .Which is the greatest in $6\sqrt{4}$, $5\sqrt{5}$, $6\sqrt{6}$, $3\sqrt{2}$ is-
A.$6\sqrt{4}$
B.$5\sqrt{5}$
C.$6\sqrt{6}$
D.$3\sqrt 2$
Answer & Explanation
Answer : Option C |
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Explanation : |
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4 .By selling a watch at a profit of 60% a man got ` 38 more than one third of its cost price. What is the cost price of watch?
Answer & Explanation
Answer : Option A |
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Explanation : |
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5 .A man whose bowling average is 12.4 takes 6 wickets for 36 runs and there by decrease his average by 0.4. The number of wickets taken by him before his last match is –
Answer & Explanation
Answer : Option D |
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Explanation : |
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6 .The average age of 11 players of a cricket team is decreased by 3 months when two of them aged 17 years and 20 years are replaced by two new players. The average age of the new players is–
Answer & Explanation
Answer : Option A |
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Explanation : |
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Total decrease = (3×11) months
= 33 months
= 2 yrs 9 months
Total age of two new players
= (17 + 20)yrs – (2 yrs 9 months)
= 34 yrs 3 months
Average age of the two new players
= $1\over2$ (34 yrs 3 months)
= 17 yrs 1 month 15 days |
7 .The value of $sin 39º\over cos 51º$ + 2tan11º tan31º tan45º .tan59º .tan79º – 3 (sin 2 21º + sin 2 69º) is –
Answer & Explanation
Answer : Option D |
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Explanation : |
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8 .A polygon has 44 diagonals. The number of sides of the polygon is–
Answer & Explanation
Answer : Option B |
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Explanation : |
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9 .
Answer & Explanation
Answer : Option C |
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Explanation : |
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When a transversal intersects two parallel lines, then co-interior angles side will
be 180º. ∠ADC + ∠BCD = 180º
∠BCD = 180º – 90º = 90º
In ABEC,
∠BAE + ∠AEC + ∠BCE + ∠ABC = 360º 90º + 120º + 90º + ∠ABC = 360º
∠ABC = 360º – 300º
∠ABC = 60º |
10 .The perimeter of a rhombus is 80 cm and the measure of one of its angle is 60º, then its area will be–
A. $100\sqrt3$ $cm^2$
B. $200\sqrt3$ $cm^2$
C. $50\sqrt3$ $cm^2$
D. $150\sqrt3$ $cm^2$
Answer & Explanation
Answer : Option B |
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Explanation : |
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