Problems On Numbers
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Each member of a club contributes as much rupees and as much paise as the number of members of the club. If the total contribution is Rs. 2525, then the number of members of the club is
-
60
-
45
-
55
-
50
D.
50
Let Number of members in the club = x
According to the question,
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If the sum of squares of two real numbers is 41 and their sum is 9. Then the sum of cubes of these two numbers is
-
169
-
209
-
189
-
198
C.
189
Let the two real numbers be x and y.
According to the question,
= (9) (41 - 20) = 9 x 21 = 189
The greater of the two numbers whose product is 900 and the sum exceeds their difference by 30 is
-
60
-
75
-
90
-
100
A.
60
Let the numbers be x and y where x > y.
According to the question,
(x + y) - (x - y) = 30
⟹ x + y - x + y = 30
⟹ 2y = 30
The least positive integer that should be subtracted from 3011 x 3012 so that the difference is a perfect square is
-
3009
-
3010
-
3011
-
3012
C.
3011
The expression is:
= 3011 x 3012
= 3011 (3011 + 1)
= (3011)2 + 3011
∴ Required answer = 3011
The product of two number is 1575 and their quotient is 9/7. Then the sum of the numbers is
-
74
-
78
-
80
-
90
C.
80
Let the numbers be x and y.
∴ (x) x (y) = 1575 (given) ...(i)
And,
(given) ...(ii)
Multiply (i) x (ii)
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Mock Test Series
Mock Test Series