Question
In 2018, the income-to-expenditure ratio of Vishal was
5:3. The following year, his income increased by 10% while his expenditure rose by 15%. Determine Vishal's income in 2018 if he managed to save Rs. 820 in 2019.Solution
Income = Expenditure + saving 5x × 110% -3x × 115% = 820 5.5x – 3.45x = 820 2.05x = 820 x = Rs. 400 Income of Vishal in 2018 = 400 × 5 = Rs. 2,000 Hence, option c.
30.01 × √1023 + 196 = ? 2 – 287
70.008% of 399.98 + ?% of 399.999 = 80.105% of 599.998
? = 26.08 + 18.99 × 25.07
A bag contains 25 white and some black balls. If the probability of drawing a black ball from the bag is thrice that of drawing a white ball, fin...
 15.78% of (287 + 302) + 12³ = ?% of 170 + 8 × 14 + 3²Â
40 × 55.96 ÷ 7 – 20% of 699.81 + 63 = ? - (11479.50 ÷ 7)
A certain sum of money invested at R% p.a. fetches a compound interest (compounded annually) of 1620 and simple interest of Rs.1500 at the end of 2 year...
4650.12 ÷ √8648.88 + √27.08 * √1727.85 = ? – 609.10 ÷ 87.07                     Â
...(439.98 ÷ 10.99) × 23.98= ? × (23.98) 2 ÷ 47.98
29.88% of 3599.90 + 5/12 of 2399.81 – 34.81% of 1200.18 = ?
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