The LCM of two numbers is 40 and their HCF is 4. If the difference between the two numbers is 12, then the sum of the numbers is [#1087]
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Q1. The LCM of two numbers is 40 and their HCF is 4. If the difference between the two numbers is 12, then the sum of the numbers is
Q1. The LCM of two numbers is 40 and their HCF is 4. If the difference between the two numbers is 12, then the sum of the numbers is
(A) 20
(A) 20
(A) 20
(B) 24
(B) 24
(B) 24
(C) 28
(C) 28
(C) 28
(D) 32
(D) 32
(D) 32
Answer: (C) 28
Answer: (C) 28
Answer: (C) 28
X * (X-12) = 40 * 4
X = 20
X + (X-12) = 20 + 20 - 12 = 28
X * (X-12) = 40 * 4 X = 20 X + (X-12) = 20 + 20 - 12 = 28
X * (X-12) = 40 * 4 X = 20 X + (X-12) = 20 + 20 - 12 = 28
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Q2. Find the odd number - 15, 17, 6, 12.
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Q3. If the salary of A is 25% more than that of B, how much percentage is the salary of B lower than that of A?
Q3. If the salary of A is 25% more than that of B, how much percentage is the salary of B lower than that of A?
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20%
= %
%
= 20%
20% = % % = 20%
20% = % % = 20%
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Q4. What is the name of the mathematical concept that describes a value that never changes, like the ratio of a circle's circumference to its diameter?
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Q5. The simple interest earned by 4,000 in 18 months at 12% per annum is
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Answer: (B) 720
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720
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Q6. If 20% of a is b, then b% of 20 is the same as :
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(A) 4% of a
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(A) 4% of a
(B) 8% of a
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(C) 6% of a
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(D) 10% of a
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20% of a is b
Hence b = 20% of a = 20a/100
b% of 20
= 20% of b
= (20/100) * 20a/100
= (20*20*a)/(100*100)
= 4a/100
= (4/100) * a
= 4% of a
20% of a is b Hence b = 20% of a = 20a/100 b% of 20 = 20% of b = (20/100) * 20a/100 = (20*20*a)/(100*100) = 4a/100 = (4/100) * a = 4% of a
20% of a is b Hence b = 20% of a = 20a/100 b% of 20 = 20% of b = (20/100) * 20a/100 = (20*20*a)/(100*100) = 4a/100 = (4/100) * a = 4% of a
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Q7. If A : B = 3, then 144A : 36B is
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(A) 4
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(B) 12
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(C) 3
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(D) 16
(D) 16
(D) 16
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Answer: (B) 12
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A : B = 3
=> = 3
=
= x 3
= 4 x 3
= 12
A : B = 3 => = 3 = = x 3 = 4 x 3 = 12
A : B = 3 => = 3 = = x 3 = 4 x 3 = 12
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Q8. The angles of a quadrilateral are in the ratio of 1 : 3 : 4 : 7. The difference between the largest and the smallest angle is
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(A) 120°
(A) 120°
(A) 120°
(B) 140°
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(C) 144°
(C) 144°
(C) 144°
(D) 145°
(D) 145°
(D) 145°
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(360°/15) * (7-1) = 144°
(360°/15) * (7-1) = 144°
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Q9. What is the term for the distance around a shape?
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(A) Area
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The perimeter is the distance around a shape, like the distance around a rectangle, triangle, or circle.
The perimeter is the distance around a shape, like the distance around a rectangle, triangle, or circle.
The perimeter is the distance around a shape, like the distance around a rectangle, triangle, or circle.
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Q10. The difference between the smallest 3-digit even natural number and the largest 2-digit even natural number is
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(A) 1
(A) 1
(A) 1
(B) 2
(B) 2
(B) 2
(C) 3
(C) 3
(C) 3
(D) 4
(D) 4
(D) 4
Answer: (B) 2
Answer: (B) 2
Answer: (B) 2
100 - 98 = 2
100 - 98 = 2
100 - 98 = 2
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