Question
Monthly savings of X is 50% of his monthly income which
is Rs. 9000. If ratio of monthly expenditure of Y and X is 15:8 respectively and monthly savings of X is 25% more than that of Y then find monthly income of Y.Solution
Monthly savings of X = 0.50 × 9000 = Rs. 4500 Monthly expenditure of X = 9000 – 4500 = Rs. 4500 Monthly expenditure of Y = (15/8) × 4500 = Rs. 8437.5 Monthly savings of Y = 4500/1.25 = Rs. 3600 Monthly income of Y = 8437.5 + 3600 = Rs. 12037.5
Twin prime numbers are the prime numbers whose difference is always equal to 2. The number of twin primes between 35 and 100 is:
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15Â Â Â Â Â Â Â Â Â Â 15Â Â Â Â Â Â Â Â Â Â 60Â Â Â Â Â Â Â Â Â Â 540Â Â Â Â Â Â Â Â 8650
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