Question
The ratio of the monthly income of K and L is 8:13,
respectively, and their expenditures are Rs. 2500 and Rs. 5000, respectively. Find the difference between their incomes if the ratio of the monthly saving of K to L is 4:7.Solution
According to the question: Let the monthly income of K = Rs. 8u Monthly income of L = Rs. 13u According to the question, (8u – 2500):(13u – 5000) = 4:7 7(8u – 2500) = 4(13u – 5000) 56u – 17500 = 52u – 20000 20000 – 17500 = 52u – 56u 2500 = 4u u = 625 Difference between their incomes = 13u – 8u = 5u = 5 × 625 = Rs. 3125
13     26      78      ?     468     936
...6Â Â Â Â Â Â Â Â Â Â Â Â Â Â 16Â Â Â Â Â Â Â Â Â Â Â 116Â Â Â Â Â Â Â Â Â 566Â Â Â Â Â Â Â Â Â 2272Â Â Â Â Â Â Â 6814
11       a�...
21, 37, 62, 98, 147, ?
6 3.5 2.5 ? 8.5 23.75
...5 14 56 220 1125 6786
...72 85 103 126 154 ?
...3 5 ? 75 1125 84375
...The number of terms in the sequence 5, 20, 80, 320,……………., 5120 is:
9256Â Â Â Â Â Â 6844Â Â Â Â Â Â 4888Â Â Â Â Â Â 3350Â Â Â Â Â 2152Â Â Â Â Â Â 1276
...Complete the series: 5, 20, 24, 6, 2, 8,?
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