Question
In a 280-litre mixture (milk + water), the ratio of
quantities of milk and water is 3:4, respectively. How much water should be added to this mixture such that the ratio of the quantity of milk to that of water in the resultant mixture becomes 2:3?Solution
Initially, Quantity of milk in the mixture = {(3 × 280)/7} =120 liters Quantity of water in the mixture = {(4 × 280)/7} = 160 liters Let the quantity of water be added to the mixture = ‘x’ liters ATQ, {120/ (160 + x)} = 2/3 Or, 360 = 320 + 2x Or 2x = 40 x= 20 liters
41, 82, ?, 984, 4920, 29520
In each of the following number series, one term is missing. Find the missing term.
2, 6, 15, 31, 56, ?, 141
8, 27, 53, ?, 161, 285
A series given below follows a certain pattern,
1800, 469, (?), 855, 980, 953
If (?) = B – 2, then find the nearest cube root of B.
What will come in place of the question mark (?) in the following series?
9, 22, 61, ?, 217, 334
Find the next term in the series:
3, 10, 21, 36, 55, ?
What will come in place of the question mark (?) in the following series?
63,...
625, 125, 375, 75, 225, 45, ?
654, 647, 633, 612, 584, ?
What value should come in the place of (?) in the following number series?
100, 149, 68, 189, ?, 245
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