Question
A 40 L mixture contains milk and water in the ratio 5:3.
How many litres of the mixture should be removed and replaced with water so that the new mixture contains 50% milk?Solution
ATQ, Initial milk = (5/8) of 40 = 25 L After replacement, milk must be 50% of 40 = 20 L Milk reduced = 25 − 20 = 5 L If x litres removed, milk removed = (5/8)x So (5/8)x = 5 ⇒ x = 8 L
What value should come in the place of (?) in the following questions?
√? + 10 * 18 + 16 * 4 = 280
What will come in the place of question mark (?) in the given expression?
64 ...
36% of 640 – 12.5% of 352 + 25% of 640 = ? – 48% of 432
(225 + 125) ÷ 7 + 250 = ? + 20% of 800
35 × 540 ÷ 18 of 15 – ? = 15Â
Simplify: (1 ÷ 0.08)
Find the value of the expression:
18 + 12 – 4 × [22 + 6 – 2 × (38 – 23)]- What will come in place of (?), in the given expression.
3² × 5 + 2³ × 4 = ? 25% of 440 + 88 X (1/2)2  - 28 = 8 X ?
What will come in the place of question mark (?) in the given expression?
(125 × 64) ÷ (8 × 5) + (12.5)² – (144 ÷ 3) = ?
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