Question
How many kilograms of rice cost Rs. 60 per kg? must be
mixed with 26 kg. of rice costing Rs. 42 per kg. so that there may be a gain of 12% by selling the mixture at Rs. 56 per kg.?Solution
Solution SP = 56 per kg profit% = 12 
Then CP = 56×100/112 CP = 50 per kg 
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612, 487,?, 396, 388, 387
Find the missing number in the given number series.
1, 2, 6, 24, 120, ?What will come in place of the question mark (?) in the following series?
36, 85, ?, 230, 330, 451
Find the missing term in the series:
2, 5, 11, 23, 47, ?
What will come in place of the question mark (?) in the following series?
400, 841, 1202, ?, 1716, 1885
44   45    41   50    ?      59    23
...221, 100, 0, -81, ?
...900 Â Â Â 90Â Â Â 18Â Â Â ? Â Â Â Â 2.16Â Â Â Â 1.08
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37, 57, 82, ?, 147, 187
