Question
A piggy bank contains ₹10, ₹5 and ₹2 coins in the
ratio 3:4:6. If the total amount in the piggy bank is ₹620, how many ₹2 coins are there?Solution
ATQ,
Let the number of ₹10, ₹5 and ₹2 coins be 3x, 4x and 6x respectively.
ATQ:
(3x × 10) + (4x × 5) + (6x × 2) = 620
Or, 30x + 20x + 12x = 620
Or, 62x = 620
Or, x = 620 / 62 = 10
So, number of ₹2 coins = 6x = 6 × 10 = 60
12 16 43 ? 184 220
...25 34 61 106 169 ?
...D irection: Which of the following will replace ‘?’ in the following series
300, 300, 301, 303, ‘?’, 324, 364
...Find the wrong number in the given series.
3 1.5 1.5 ? 4.5 11.25
...60 61 126 387 ? 7845
If 14, 32, x, 50, -13, 86,
then, find the value of (10x + 5x – 20)?
...7, 26, 238, 962, 8522, 34078
If 6 4 x 5.75 9,
Then, (x²-1) = ?
...21 11.5 13 ? 45.5 116.75
...1335 737 355 141 47 ?
...
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